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  Quality Plating Co., Inc.

801-355-7424  

sales@qualityplating.com  




Services/Finishes

We offer a wide range of plating finishes as indicated by the following list. We have included some general information, but please contact us to answer questions related to your specific needs.


Index view

Anodizing, Chromic Acid

Anodizing, Chromic Acid

Mil-A-8625 Type I, Class 1 and AMS 2471

Chromic Acid Anodizing is an industial, functional finish. Because of the toxic nature of hexavalent chrome, this type of anodizing is being replaced with a sulfuric anodizing whenever it is allowable. The aerospace industry is the largest user of Chromic acid anodizing today. Chromic acid anodizing has three advantages over Sulfuric acid anodizing.

- The coating thickness is very thin thus making it easier to hold close tolerance. The average coating buildup is 0.000050" thick.

- Chromic acid is not as detrimental to the aluminum as sulfuric acid. Therefore parts with complex shapes that trap the anodizing solution are not attacked in these areas.

- Chromic Acid anodizing introduces less stresses into the material than Sulfuric acid anodizing.

Chromic acid anodizing is a gray color and because of the thin coating thickness, it is not easily dyed. Even under the best circumstances, a part which is dyed black will have a very grayish appearance.


Anodizing, Hard

Anodizing, Hard

Teflon post treatment available

MIL-A-8625 Type III, Class 1 & 2 and AMS 2468

Hard anodizing is an electro-chemical process which builds an aluminum oxide coating on the aluminum surface. Hard anodizing is specifically used to increase the abrasion resistance of aluminum. The coating is very hard and machinists' are not excited to drill through the coating or clean up threads which don't fit after anodizing. The thickness is typically 0.0018" to 0.0022". The build up is 1/2 the anodize thickness since the anodizing penetrates the surface of the aluminum.

In order to keep the hard anodizing as hard as possible, it is not sealed unless instructions are given to do so. In order to increase the corrosion resistance of hard anodize, it can be sealed in DI water, nickel acetate or sodium dichromate. The sealing will decrease the hardness of the coating.

Our process is a standard hard anodize process which turns the aluminum dark as the coating gets thicker. It can be dyed black, but other colors show very poorly in the dark background.

All anodized parts must have a contact to the base aluminum; therefore, it is common to have a rack mark. The size of the rack mark will depend on the size and geometry of the part. Please call to discuss the rack mark if you have concerns.

Frequently Asked Questions

What aluminum alloys may be difficult to hard anodize? Aluminum alloys are not a homegenous mixture. Foundry procedures and cooling times can cause pockets of metals in the alloy. 2000 series aluminum can have some pockets of copper and these are places where the part can possibly burn because the electrical resistance is lower. 7000 series aluminum can get blisters in areas where zinc accumulated.

What should I do with threads? Unless you cut the threads to accept the anodizing thickness, threads should be plugged or covered to keep them from being anodized. Remember the pitch diameter changes four times the build-up per surface. Also take into account that more anodizing will build-up on the peak of the thread than in the valley.


Anodizing, Sulfuric Acid

Anodizing, Sulfuric Acid

Bright dip, clear and colored finishes

Mil-A-8625 Type II, Classes 1 & 2 and AMS 2471

The thickness of this anodize process is normally between 0.0001" and 0.0006" thick. The build-up is 1/2 of the total thickness since 1/2 of the anodizing layer penetrates the base metal. The aluminum oxide makes the surface of the aluminum harder and it keeps the black oxide from rubbing off the aluminum, but the corrosion protection comes from the sealer after the anodizing by placing metal salts in the pores of the oxide.

The coating can be dyed colors using organic dyes; however, these colors will eventually fade in direct sunlight.

Frequently Asked Questions

Why did my black fade to purple in a few weeks? The quality of the dye used and the quality of the sealer after the dye will keep the colors from fading. We only use the highest quality dyes and we seal all our parts with a hot nickel acetate solution for the highest quality colors.

Why are some of my parts different colors after a clear anodizing? Different alloys of aluminum will anodize a slightly different color, so the end product will also look different even if the part is dyed. To keep the colors the same, use consistant lots of aluminum alloys.

How far will the anodizing go into a hole? A general rule of thumb is that the anodizing will stay a consistant thickness into a hole, the distance of the hole diameter. The anodizing will then begin to get thinner as the hole goes back further.


Bead Blasting

Bead Blasting

Our cabinet is approximately ___ in size.


Black Oxide

Black Oxide

Featuring both cold and hot applications.

on Steel and Stainless steel

MIL-C-13924; AMS 2485

Black Oxide is a surface treatment which forms an oxide coating on the surface of steels and stainless steels which is black. It's main application is to change the color of the steel without risk of chipping or peeling where a coating of oil is permissible. Black oxide has no corrosion protective properties on it's own, but it does make a superior surface for the application of oil to keep the surface from rusting. Common uses for black oxide are tooling, small screws for consumer goods and engine parts.

The hot black oxide treatent is a better black oxide coating in both function and look; however, when the part does not fit into the processing bath, the cold process is a good alternative.

The most popular specifications which our process meets is MIL-C-13924 Class 1 and 4 and AMS 2485.

Frequently Asked Questions

Does Black Oxide have a thickness or buildup? No. Black oxide is a surface treatment only and does not have thickness or buildup.

Is it possible to black oxide other metals then steel and stainless steel? Yes. There is a black oxide treatment for copper and copper alloys.

How scratch resistant is black oxide? Black Oxide is fairly scratch resistant, more so than a black chromate on zinc plating.


Black Zinc Plating

Black Zinc Plating

We offer superior quality and beauty of finish for.

for both barrel and racked parts

Black zinc plating is a zinc plating with a black chromate applied as a post treatment. Black zinc is a popular corrosion resisting finish for steel. The advantages of black zinc over other ways to blacken steel are many. Black zinc is a corrosion resistant coating whereas a black oxide coating is not. Black zinc is much thinner than a black paint or powder coating. The main disadvantage of black zinc is that it does scratch fairly easily.

It is possible to put a black dye over zinc plating; however, the black dye will decrease the corrosion resistance of the zinc coating. A black dyed zinc plated part will not pass salt spray for ASTM B633. The black chromate actually increases the corrosion resistance of the zinc coating. Quality Plating uses the black chromate process since it is a supperior product.

The black chromate can have a slight irridescence or some colors of the rainbow in the black color. It is also possible to barrel plate using the black chromate but the finish will not be as cosmetic because the parts are hitting one another and leaving some scratching.


Brass Plating

Brass Plating

Polish - Antique - Satin

Accessories for your home including door hardware, heat registers and plumbing fixtures.

Brass plating is an electro-chemical process which deposits a thin layer of brass (copper-zinc alloy) on metal. Brass is typically used for decorative purposes over a layer of nickel. Plated brass should always be coated with a lacquer to keep the brass from tarnishing. Because the coating is thin if one tried to polish a brass plated item, the brass would be easily removed.

We plate a wide range of household items. Some new, but a majority of refurbishing old items. This includes heat registers, door hardware, bathroom accessories and cabinet hardware.

When we refurbish old items we typically go through the following steps.

We remove the old lacquer or paint.
We remove the old plating.
We brush or polish the base metal.
We copper - nickel - brass plate
We lacquer the item.



Cadmium Plating

Cadmium Plating

Yellow, Clear, Olive Drab

QQ-P-416 all Types and Classes

AMS 2400

Cadmium plating is a process which electro-chemically deposits a thin coating of cadmium on a base metal. It's primary purpose is corrosion resistance, lubricity, conductivity and solderablility. Most aircraft fasteners are cadmium plated for the corrosion resistance and lubricity. Electrical conducting parts are sometimes plated to keep the base metal from corroding and reducing conductivity. Cadmium plating is also used as a sacrificial coating between stainless steel and aluminum to keep a galvanic reaction from occuring.

Cadmium metal is considered a toxic metal by the US EPA and many countries overseas. Therefore many items which were once cadmium plated are now protected by other metals. Because of the properies of cadmium no single cost effective alternative has been found for every application, especially in the U.S. military. Using cadmium in many applications can be justified by comparing the effects on the environment with cadmium substitutes.

Typical thicknesses for cadmium plating are 0.0002" to 0.0005". Clear, yellow and olive drab chromates are available post treatments and the corrosion resistance increases with the darkness of the chromate without the part getting powdery.

Can zinc take the place of cadmium? No. Cadmium has 2 to 3 times the corrosion resistance of zinc. Zinc does not have the lubricity, conductivity, or solderability of cadmium.


Chemical Film/Alodine

Chemical Film/Alodine

Alodine 1200, Alodine 600, Iridite 14-2

MIL-C-5541 Classes 1A and III; and AMS 2473

Chemical Film or Chromate Conversion Coating on Aluminum is a surface treatment which enhances the corrosion resistance of aluminum. Although it appears to be one of the simpler processes, it has the most names and specifications. In addition to maximize the corrosion resistance of chemical film, certain pretreatment and post treatment steps are of the utmost importance. Passing salt spray testing can be tricky without proper knowledge. Chemical film is used for corrosion resistance and a paint base. When electrical conductivity and corrosion resistance are both required, chem film is a good choice.

The coating comes in both iridescent yellow and clear colors; however, it should be noted that the yellow gives superior corrosion resistance. The lighter color gives lower electrical resistance. It should also be noted that chemical film is fragile directly after processing and a 24 hour waiting time before handling the parts is preferrable. Temperatures over 120 F will also break down the corrosion resistance of the coating. In comparison to anodizing the chemical film is fragile and it is not fit for high use areas as the coating can be easily damaged.

Frequently Asked Questions

Does chemical film add thickness? No, chemical film is a surface treatment and it will not build up. It should be noted that some companies will heavily etch the surface for cleaning before processing. If you have close tolerances, please let the operator know so he will not etch off too much material.

Names for Chemical Film

Generic Names

Chemical Film
Chemical Conversion Coating of Aluminum
Chromate Conversion Coating of Aluminum
Passivation of Aluminum
Yellow Chromate
Clear Chromate

Proprietary Names

Alodine - product of Henkel Technologies
Iridite - product of MacDermid



Chrome Plating - Decorative

Chrome Plating - Decorative

Polished - Satin/Brushed

Sorry - No car parts.

Decorative chrome plating is an electro-chemical process which deposits a thin layer of chrome over a deposit of bright nickel plating. The bright nickel plating is usually about 0.0005" thick and the chrome is typically 0.00004" to 0.0001" thick. The bright nickel has the great shine which we all love to see. The chrome is applied to keep the nickel from tarnishing and gives that crisp blue tint to the shiny "silver" color. It should be noted that all the scratches and blemishes must be removed from the base metal before plating to get that smooth, slick finish.

The chrome can also be applied as a dull, brushed, or satin finish such as on a firearms or medical equipment. The dull finishes reduce relection and give a surface which will hide blemishes.

Sometimes you will notice yellow-brownish marks on decorative chrome parts. This is the nickel undercoating showing. I was in the grocery store the other day and I noticed that all the chrome was worn off the top of the shiny bar which seperated the cash registers. You could see the yellow-brownish tint as opposed to the blueish tint of chrome.


Chrome Plating - Industrial Hard

Chrome Plating - Industrial Hard

Large and Small Items

QQ-C-320; AMS2406

Industrial or hard chrome plating is the electro-chemical process of depositing chrome directly on the base metal of the part. It is used primarily for wear resistance and it does give a limited amount of corrosion protection. The most common example of hard chrome plating would be hydraulic cylinders. Many other mechanical parts are also hard chrome plated for wear resistance.

Hard chrome can be deposited on steel, stainless steel, high nickel alloys, and copper alloys. Although it is possible to plate chrome directly on aluminum, only a few companies are capable of doing this. Quality Plating Co. is not capable of hard chrome directly on aluminum.

The coating thickness varies from 0.000050" to 0.050". As all electroplating the coating thickness will vary according to the geometry of the part being plated. Points, edges and the top & bottom of the part will build up more chrome than the recessed areas, insides of corners and center of parts. The uneven buildup becomes more prevalent as the coating thickness increases. For this reason many parts are ground after plating to bring the part to size.


Copper Plating

Copper Plating

Polished - Antique - Satin/Brushed - Industrial

Mil-C-14550 Class 0,1,2,3 & 4

Copper plating is an electro-chemical process which deposits a thin layer of copper on metals. Copper is used as an undercoating, a maskant for case hardening, and a decorative finish. The typical plating thickness is 0.000020" to 0.002".

Copper is used as an undercoating to assist with adhesion to the basis metal. It is commonly used before nickel plating.

Copper is used as a maskant for carburizing. The thickness of the copper is typically 0.002" thick for this purpose and it must be plated from an alkaline bath.

Copper is plated over nickel as a decorative finish. It can have a polished, satin or antique finish. The finished piece is then lacquered so the copper will not tarnish.


Decorative Finishes

Decorative Finishes

Lacquering included in either epoxy or regular on all finishes except chrome.

Brass ~ Polished - Antique - Satin

Chrome ~ Polished - Satin - Brushed

Copper ~ Polished - Antique - Satin

Nickel ~ Polished - Antique - Satin - Pewter

Oil Rubbed Bronze

Gold ~ Polished - Satin

Black and Dull Black finishes

Silver ~ Polished - Satin

These Gold and Satin Nickel Plated chandeliers hanging in Grand Central Station in New York City were re-plated in our plant in Salt Lake City.



Dow#7

Dow#7

Mil-M-3171 Type I and III

Dow #7 is a chromate conversion coating on magnesium. It forms a protective layer to help prevent corrosion and it also works well as a paint base on magnesium. It is simmilar to a chemical film on aluminum.



Gold Plating

Gold Plating

22K and 24K available

MIL-G-45204

Gold plating is the electro-chemical process of depositing a thin layer of gold on metal. Gold can be plated directly on a base metal or it can be applied over an undercoating such as nickel to improve adhesion of the gold itself. The purpose for gold plating includes conductivity, decoration, corrosion protection and reflectivity. We are experienced in plating electrical contacts, decorative artworks, satellite and aircraft parts.

Gold is often used for conductivity instead of silver because it is a cleaner tarnish free surface. Gold is also impervious to certain chemicals making it the preferred choice with respect to corrosion protection under special applications.

Gold is plated in thicknesses starting at 0.000006" which is used for costume jewelry. Our thickness limit is 0.0001". 0.00002"-0.00003" is a commonly used thickness for some wear. Our gold is alloyed with cobalt and nickel and they are considered a hard gold.

In most plating processes, materials are a small part of the cost, but with gold the material cost becomes a determining factor especially on parts with large surface areas.


Nickel Plating

Nickel Plating

Polished - Satin - Antique (Pewter Finish)

QQ-N-290 Class 1 & 2 Grade A through G; AMS 2403

Nickel plating is the backbone of decorative electroplating. Nickel has properties which allow it to shine, throw into corners and even smooth out surfaces. It is the undercoating for most shiny plating surfaces.

Nickel itself has a very nice color. The chrome can sometimes look cold with its blue tint; but nickel has a warmer, yellow-brownish tone. It is a common finish on coal stoves, and antique items.


Nickel Plating - Electroless

Nickel Plating - Electroless

Mil-C-26074 all Classes & Grades; AMS 2404

Electroless nickel is a plating process which deposits an even layer of a nickel-phosphorous alloy on a part. It's properties include corrosion resistance, hardness, and abrasion resistance. A typical thickness of plating varies from 0.000050" to 0.002" thick. The beauty of this process as compared to electrolytic processes is that the coating builds up evenly on all surfaces the solution touches with adequate circulation.

Our process deposits approximately a 92% nickel/8% phosporous coating which is considered a "mid-range" alloy. Other processes with less phosphorous produce coatings with less corrosion resistance and more hardness and process with more phosphorous produce coatings with more corrosion resistance and less hardness.

Our electroless nickel deposit as plated has a hardness of about 45 Rc and it can be baked to produce a hardness between 50 and 55 Rc.

Electroless nickel is used on molds, machine parts, valves, aircraft, . . . We can plate it on aluminum alloys, nickel alloys, steel alloys and copper alloys.


Nickel Plating - Sulfamate

Nickel Plating - Sulfamate

QQ-N-290 and AMS 2424

Sulfamate nickel plating, also called ductile nickel, is an electro-chemical process which deposits a thin layer of nickel on a metal base. It is used primarily for functional purposes like corrosion protection and salvaging parts. It can be applied in thicknesses from 0.00005" to 0.050".

Sulfamate nickel is soft enough to machine. Because it can be built up heavy, it is used to salvage undersize parts when a hard surface is not required. It is also used for corrosion protection of parts which stretch or move because the soft nickel is ductile and will bend without cracking.

It should be noted that the coating thickness is not uniform on all surfaces. As is usual in electroplating the high current density areas (edges, points, top or bottom) builds up faster than the low current density areas (recessed areas, inside corners, center of plates.) This becomes more evident as the thickness of the coating increases.


Passivation

Passivation of Stainless Steel

QQ-P-35 Type II, VI, and VII, Mil-S-5002, ASTM A967

Passivation of Stainless Steel is a process which treats the surface of the metal to impede corrosion. The process has two primary functions. First to remove any iron on the surface of the part. Second to promote the growth of nickel and chrome oxides which give stainless steel its excellant corrosion resistant surfaces.

Passivation is used in many industries Also a broad sprectrum of nickel alloys can be passivated. These include 300 series, 400 series, inconel, hastelloy, 17-4, 13-8 and A286. It should be noted that if a stainless steel is improperly heat treated there is a risk of etching the parts in the passivation process - this mostly a concern for 400 series alloys.


Phosphate - Manganese

Phosphate - Manganese

DOD-P-16232 Type M

Manganese phosphate is used to improve the corrosion resistance and the lubricity of steel. It is typically oiled or sprayed with a dry film lubricant. It is a somewhat grainy surface which is best applied on a sandblasted surface. The grain is much more even on a sandblasted surface.

The amount of phosphate applied is typically specified by coating weight and not thickness. This is because the coating is soft and grainy and it can be difficult to know when to stop turning the micrometer. A heavy manganese coating can add several thousandths of an inch to each surface.


Phosphate - Zinc

Phosphate - Zinc

DOD-P-16232 Type Z; TT-C-490 Type V

Zinc phosphate coating is an immersion process which forms a grainy phosphate coating on steel. It is often called "Parkerizing." Zinc phosphate is used for corrosion resistance or a paint base and the items are either oiled or painted after processing. The zinc phosphate acts as a sacrificial coating for steel.



Polishing

Polishing

Aluminum or Steel


Sanding - Stroke & Timesave

Sanding - Stroke & Timesave

Sanding: Stroke or Timesave


Silver Plating

Silver Plating

QQ-S-365 and AMS 2412

Silver plating is an electro-chemical process which puts a thin layer of silver over another metal. It is principly used for lubricity, conductivity and decoration. It is used on products like gears and seals for lubricity, buss bars and contacts for conductivity and pieces of art for decoration. We are very successful in plating silver for each of these purposes. A typical thickness for silver plating is 0.0001" to 0.0005".

When silver is applied for lubricity and conductivity, it is typically plated directly on the base metal, unless an undercoating is required for adhesion such as a nickel stike to help the plating adhere to nickel alloys. For decorative applications the silver may have an undercoating of bright nickel to take advantage of the nickel's ability to shine.

Frequently Asked Questions

Why is silver used for electrical connections even though it tarmishes so fast? Tarnished silver or silver oxide is almost as conductive as silver and it is still more conductive than gold.


Tin Plating

Tin Plating

Mil-T-10727 Type I

Tin plating is an electroplating process which deposits a thin layer of tin on a metal surface. Tin is most commonly plated directly on the base material without an undercoating. It's most common uses are corrosion protection and solderability. It is used on copper buss bar to protect the buss bar, as well as help the solderability of the copper. Tin plating can be used on items which can be found around food; however, mixing bowls, pots and other kitchen devices are more commonly "hot-dipped" in molten tin.



Zinc Plating

Zinc Plating

Parts up to 116 inches long

ASTM B633 All types and classes

Zinc plating is a process which deposits a thin layer of zinc over a metal substrate which is usually steel. It is different from galvanizing because zinc plating is an electro-chemical process and not a dip in molten zinc like galvanizing. The advantages of zinc plating over galvanizing are control over zinc thicknesses, smoother surfaces and less damaging to fragile parts. The disavantage is less corrosion resistance since the zinc thickness is much thinner. Zinc plating has also been called electrogalvanizing.

Zinc plating is commonly used on fasteners and sheet metal fabricated parts in thickness from 0.0001" to 0.0005" thick. It should be noted that since zinc plating is an electroplating process thickness will vary with locations on the part and inside areas will not be plated without special considerations.

Zinc plating protects the steel as a sacrificial coating as well as a barrier like nickel plating. The advantage of a sacrificial coating is if the coating is damaged, the rust has a more difficult time penetrating the material around the damaged coating. Zinc plating is also a good paint base and it will greatly improve the corrosion resistance of the paint.

The actual zinc plating is RoHS compliant; however, the chromates which are applied to the zinc plating to increase the corrosion resistance are not necessarily RoHS complaint. At this time our clear chromate, Type III, is RoHS compliant. We still offer a yellow chromate, Type II, which does not meet RoHS commpliance. We do offer a heavy build chromate with is a greenish-blue color which will meet the salt spray requirements of a traditional yellow chromate and it offers RoHS compliance.













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