Accession Number : AD0286842

Title :   PROCESS-ELECTROLESS NICKEL-THICKNESS REQUIREMENTS FOR HARDNESS TESTING-DETERMINATION OF

Corporate Author : GENERAL DYNAMICS/FORT WORTH TEX

Personal Author(s) : REYNOLDS,J.D.

Report Date : 23 APR 1958

Pagination or Media Count : 1

Abstract : Electroless Ni plated well on all specimens. The rate of deposition on 4130 steel was considerably less, being approximately 3 mils in 5 hours, as compared with 3 mils in 90 minutes on the 2024 Al alloy. However, the Ni exhibited poor adhesion to the 2024 Al coupon. One plated 4130 steel coupon was heat treated to improve hardness at 700 F for one hour and air cooled. Each one of the 3 plated specimens was sectioned and mounted in bakelite. The Tukon hardness test was made on the mounted specimens in the edge of the Ni plate t establish the true hardness of the Ni plating. The Rockwell C hardness was not applicable. The Rockwell 15N superficial hardness, being quite shallow and suited for surface hardness, was determined. The Vickers tester was not available. (Author)

Descriptors :   *HARDNESS, *NICKEL, *PLATING, *THICKNESS, ALLOYS, ALUMINUM ALLOYS, ELECTROPLATING SOLUTIONS, SOLUTIONS(MIXTURES), STEEL

Distribution Statement : APPROVED FOR PUBLIC RELEASE