Corrosion and corrosive‐wear behaviors of a high strength and toughness Cu–15Ni–8Sn alloy in seawater

Abstract

The Cu–15Ni–8Sn alloy with high strength and toughness is a common bearing alloy, while it is often subjected to premature failure in service due to corrosion and wear. Therefore, the corrosion and wear behaviors of an ultra‐high‐strength and toughness Cu–15Ni–8Sn (wt%) alloy fabricated by hot isostatic pressing were investigated in this study. The results indicated that intergranular corrosion and pits were observed when the studied alloy was immersed into seawater for 30 days. When the Cu–15Ni–8Sn alloy slid in seawater, there was a synergistic effect between corrosion and wear. With the increase of normal load, the synergistic effect weakened initially and then enhanced the interaction between corrosion and wear changed from negative to positive, and the main wear mechanisms transferred from abrasive wear into delamination.

Investigation of corrosion characteristics of Cu-10Ni-1.2Fe-xMn (x = 0.53, 0.87, 1.19) alloy in 3.5% NaCl solution

“…Although cupronickel alloys have better corrosion resistance than other materials, corrosion and leakage accidents of cupronickel alloy pipes are still frequently reported, causing signicant economic losses. 10,11 The corrosion problem of cupronickel alloy seawater pipelines has been plagued by industries such as ships and coastal power plants and is an urgent problem to be solved. 12 And the effect of changes in Mn content on the corrosion behavior of cupronickel alloys has not been fully studied.…”