MIL-STD-865D
well on all base metals and is especially useful in the activation of high strength steels, dissimilar metals and unknown metals. Reference MIL-STD-1504 and the solution manufacturer's recommendation for the use of this method.
5.4 Plating on dissimilar metals and changing base. As a general rule when you have two dissimilar metals to plate on, follow the plating procedure for the one with the most steps of activation. IF activation steps have to the mixed, use of reverse current activation steps. EXAMPLE: Fill pits in chrome plated aluminum.
break on surface.
a. Electro-clean using forward current until water does not
b. Rinse thoroughly with clean tap water.
c. Activate the aluminum surfaces using reverse current and the appropriate solution until a uniform gray to black surface is obtained.
d. Rinse thoroughly.
appropriate solution.
e. Activate the chrome surface using forward current and the
f. Do not rinse.
g. Immediately nickel-flash the surface to thickness of 0.001 inch. Nickel flash with one of the pre-plate nickels.
h. Rinse thoroughly.
thickness.
i. Continue plating with the desired metal to the proper
j. Rinse and dry.
5.5 Surface preparation. The selective plating solution manufacturers have prepared and made available comprehensive literature on the use of their solutions. The literature should be reviewed when planning a selective plating repair. The following selective plating procedures for plating on some of the more common basis are
presented as a guide.
5.5.1 Plating on aluminum and aluminum alloys.
a. Electro-clean with Cleaning and Deoxidizer 1010 or equivalent solution using forward current.
b. Rinse thoroughly with clean tap water.
c. Activate with reverse current until a uniform gray to black surface is obtained. "DO NOT" over activate.
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