MIL-DTL-5002E
c. As an undercoat for the other functional coatings (see 3.10).
d. To restore dimensions by rebuilding worn surfaces.
e. For resistance to sand erosion.
f. When not in contact with aluminum or aluminum alloy coating, except when
approved by the cognizant engineering organization.
3.6.11 Electroless nickel coating. Electroless nickel coatings shall be in accordance with
SAE AMS2404. Unless otherwise specified by the cognizant engineering organization,
when electroless nickel is used for corrosion protection or wear resistance, the thickness shall be
not less than 0.0015 inch and shall be not greater than 0.003 inch.
3.6.12 Silver plating. Silver plating shall be in accordance with ASTM B700. When
electrodeposited silver is used on steel, an underplate of either copper or nickel, or a combination
of both, shall be applied. Unless otherwise specified by the cognizant engineering organization,
the underplate and the silver plate thickness shall be not less than 0.0005 inch, yielding a 0.001
inch minimum total thickness. Silver plating shall not be used in the following applications:
a. On titanium or in contact with titanium for parts that are used at temperatures
above 350° F (177° C) in service. Under certain conditions, titanium can be embrittled
by contacting silver components. Embrittlement has been determined to occur in silver
brazed titanium parts at temperatures above 350° F (177° C).
b. With nickel base alloys for parts that are used above 1000° F (538° C) in service.
c. On aluminum or aluminum alloys, or in contact with aluminum parts, unless
approved by the cognizant engineering organization
3.6.13 Gold plating. Gold plating shall be in accordance with MIL-DTL-45204.
3.6.14 Palladium plating. Palladium plating shall be in accordance with ASTM B679.
3.6.15 Rhodium plating. Rhodium plating shall be in accordance with MIL-R-46085.
3.6.16 Copper plating. Copper plating shall be in accordance with SAE AMS2418.
3.6.17 Zirconium oxide coating. Zirconium oxide coating shall be processed from
materials in accordance with MIL-Z-81572.
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