TYPES |
THICKNESS BUILDUP |
SPECIFICATION |
COMMONLY USED ON |
APPEARANCE |
CHARACTERISTICS AND USES |
Chromic Anodize |
.00005"- .00030" |
MIL-A-8625C |
Aluminum & Aluminum Alloys |
Clear to Black |
Good resistance to corrosion. May be used as a paint base. Decorative. Available in many colors, however, parts more easily colored with the sulfuric anodizing process. |
Sulfuric Anodize |
.00005"- .00100" |
MIL-A-8625C |
Aluminum & Aluminum Alloys |
Clear to Black |
Good resistance to corrosion. May be used as a paint base. Most commonly used anodizing process. More flexible in dyeing parts than chromic anodizing. Do not use where joints or recesses exist to trap solution. |
Chromate Conversion Coating |
.0002" max |
MIL-C-5541 |
Aluminium & Aluminum Alloys |
Clear to Black |
Good resistance to corrosion. May be used as a paint base. Decorative. Available in many colors. Good electrical conductivity. Excellent protection against tarnishing, finger marking and other conditions tending to produce surface oxidation. |
Straightline |
N.A. |
. |
Aluminum & Aluminum Alloys |
Brushed |
Belt sanding produce parallel scratch lines in one direction. Decorative. Non-reflective surfaces. Straightlining is usually followed by sulfuric anodizing. |
Passivation |
.0002" max |
QQ-P-35 |
Stainless Steel |
None |
Passivation is a cleaning process used to remove small particles of corrosive foreign matter embedded in the material from machining. No material buildup obtained |
Cadmium Plating |
.0002"- .0005" |
QQ-P-416C |
Steel, Iron |
Silver-White |
Good corrosion resistance. Nice appearance. Less apt to darken or form corrosion products than zinc plating. |
Manganese Phosphate |
.0002"- .0006" |
AMS-2481 |
Steel, Iron |
Black |
Good for use to aid on breaking-in on moving parts. |
Zinc Plating (Electro deposited) |
.0002"- .0010" |
QQ-Z-325C |
Steel, Iron |
Bluish-White to Black. |
Good corrosion resistance. Very easily and rapidly applied. Retards tarnishing. 4 to 6 cheaper than cadmium plating. |
Chromium Plating (Electro deposited) |
.0001"- .0002" |
. |
Ferrous, Non-Ferrous and some plastics |
Dull to Bright |
Excellent resistance to wear, abrasion and corrosion. Low coefficient of friction. High reflectivity. Popular decorative coating. May be used to build up surfaces. |
Nickel Plating (Electroless) |
.0002"- .0016" |
QQ-N-290A |
Ferrous, Non Ferroud and some plastics |
Dull to Bright |
Excellent resistance to a wide variety of chemicals and corrosive atmospheres. Excellent plating for decorative appearances. May be used to build up surfaces. Not recommended for non heat treatable metals. |
Silver Plating (Electro deposited) |
.0005" min |
QQ-S-365C |
Ferrous, Non Ferrous and some plastics |
Dull to Bright |
Good resistance to many chemicals and corrosion. Excellent decorative appearance. Excellent electrical conductivity and low contact resistance. |
Gold Plating (Electro deposited) |
.00002"- .00150" |
MIL-G-45204B |
Brass, Copper, Nickel, Silver, and some plastics |
Yellow |
Good resistance to tarnishing, chemicals and high temperature oxidation, good ductility, thermal reflectivity and electrical conductivity. |
Tin Plating |
.0002"- .0020" |
MIL-T-10272A |
Ferrous |
White |
Good resistance to corrosion. Attractive appearance. Easily solderable. Soft and ductile. |
Copper Plating |
.0001"- .0010" |
MIL-C-14550 |
Ferrous, Non Ferrous and some plastics |
Pink or reddish |
Good resistance to corrosion. Nice appearance. High electrical and thermal conductivity. Good wire coating. Used as an undercoat for chromium and nickel plating. |
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