Copper-Nickel Cladding on Stainless Steel
Abstract
Copper-nickel cladding on conventional and super-austenitic stainless steel has proved effective in reducing maintenance (from biofouling, reapplication of anti-fouling coatings, and corrosion) for various small ferries, tankers, and ships in Europe and North America for periods of up to 30 years. This technology may have potential benefits and applications for the U.S. Navy, but several issues such as corrosion, mechanical and structural properties need to be evaluated and resolved before the possibility of copper-nickel cladding can be considered for use in the Fleet. Paints may not adhere on stainless steels as well as steels and may cause crevice corrosion of the stainless steel if the coating is compromised. Copper-nickel cladding of austenitic stainless steels may also offer some ballistic, non-magnetic, and electromagnetic signature advantages over current hull alloys and corrosion control technologies, but is not discussed in this report. The purpose of this study is to evaluate corrosion-related benefits/disadvantages of using copper-nickel cladding on stainless steel structures. This study evaluates (1) the fouling characteristics of 70/30 (UNS C71500) and 90/10 (UNS C70600) copper-nickel cladding as an antifoulant and as a potential replacement for antifoulant coatings, (2) the crevice corrosion resistance of copper- nickel alloys with AL6XN or cheaper grades of austenitic stainless steels, (3) the effects of galvanic corrosion of copper-nickel alloys coupled to AL6XN or other stainless steel alloys, (4) effects of copper-nickel cladding on fabrication, and (5) corrosion impact of Cu-Ni/SS clad bi-metallic structures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2005
- Accession Number
- ADA441940
Entities
People
- David A. Shifler
Organizations
- Naval Surface Warfare Center Carderock Division