Accession Number:

AD0753360

Title:

Conductive, Lusterless Coatings for Light Metals

Descriptive Note:

Final rept. 1 Mar-31 Aug 1972

Corporate Author:

BATTELLE COLUMBUS DIV OH

Personal Author(s):

• Layer, C. H.
• Schaer, G. R.
• Beach, J. G.
• Safranek, W. H.

Report Date:

1972-12-01

Pagination or Media Count:

43.0

Abstract:

A metallic conductive, lusterless plating system with improved corrosion durability developed for aluminum was the basis for a program on the improvements of the corrosion durability of magnesium. A composite of electroplates containing either a fused tin or a cobalt-nickel alloy was effective for inhibiting corrosion pits from penetrating through the coating into the magnesium substrates. The efficacy of the coating was not completely demonstrated because of inconsistent quality adhesion of copper strike on magnesium, however. A technique proposed for improving the quality of the copper strike includes a cyanide treatment after the application of a zinc displacement coating on magnesium, to improve the adhesion of the subsequent copper strike.

Descriptors:

• *CORROSION INHIBITION
• *METAL COATINGS
• *MAGNESIUM ALLOYS
• *ELECTROPLATING
• CORROSION RESISTANCE
• TIN
• COBALT ALLOYS
• NICKEL
• NICKEL ALLOYS
• WEAR RESISTANCE

Subject Categories:

• Coatings, Colorants and Finishes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE