Corrosion of Nickel Plated Steel at Tropical Environments
Abstract
Double-layer nickel deposits were compared with single-layer deposits (with chromium flash topcoats) for corrosion protection provided to steel exposed at several tropical environments. The double-layer nickel plated steel was considerably more corrosion resistant than single-layer nickel at tropical marine and open field exposures. There was no apparent benefit to the double layer at rain forest exposure, however. 40 micrometers (1.6 mil) total thickness of double-layer nickel was virtually completely protective to steel at the open field and rain forest sites over 35 months' exposure whereas 20 micrometers thickness was not. At the coastal marine site, the 40 micrometers double-layer coated specimens had only slight basis metal attack after 35 months' exposure. Elimination of the chromium flash topcoat on 40 micrometers nickel deposits in some instances appeared to improve resistance to basis metal attack but greatly reduced the surface tarnish resistance. A semi-bright nickel electrodeposit with an electroless nickel topcoat was superior in corrosion protection to the conventional double-layer nickel electrodeposits of the same total thickness. However, the electroless nickel deposits tarnished badly at the tropical exposures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1971
- Accession Number
- AD0764149
Entities
People
- Fred Pearlstein
- Leonard Teitell
Organizations
- Frankford Arsenal