Improving the corrosion resistance of copper-nickel alloy is crucial to extend its service life in marine engineering. In this study, hot rolling was used to improve the corrosion resistance of the alloy, and the reasons for the improvement of corrosion resistance were explored. The corrosion rate of the alloy was reduced by 89% from 0.0150 mm/a to 0.0017 mm/a when the deformation amount is 80%. The improved corrosion resistance can be attributed to two reasons: (1) hot rolling promotes the formation of dense Cu2O film in the corrosion product, reduces the content of loose Cu2(OH)3Cl, making the corrosion product film more compact, (2) Fe, Ni and Sm elements involved in the formation of the corrosion product film, generated Sm-S phase, γ-FeOOH and Ni(OH)2, making the corrosion potential shift positively. This work proposes an alternative approach to enhance the corrosion resistance of copper alloys.
JiangYZhangWJMiXJ, et al.Antibacterial property, corrosion and discoloration resistance of pure copper containing Zn or Ni. Rare Met2022; 41: 4041–4046.
2.
RosalbinoFCarliniRSoggiaF, et al.Influence of rare earth metals addition on the corrosion behaviour of copper in alkaline environment. Corros Sci2012; 58: 139–144.
3.
PangHBaoJLiQ, et al.Effect of Sm on microstructures and mechanical properties of Mg–Gd (–Sm)–Zr alloys by hot extrusion and aging treatment. J Mater Res Technol2022; 19: 3877–3893.
4.
LiuJLuZZhangL, et al.Studies of corrosion behaviors of a carbon steel/copper-nickel alloy couple under epoxy coating with artificial defect in 3.5wt.% NaCl solution using the WBE and EIS techniques. Prog Org Coat2020; 148: 105909.
5.
GaoPRenYQianS, et al.Evolution of microstructure and electrochemical corrosion behavior of CuZn-based alloys induced by cold rolling. J Mater Res Technol2021; 15: 360–368.
6.
NorthRFPryorMJ. The influence of corrosion product structure on the corrosion rate of Cu-Ni alloys. Corros Sci1970; 10: 297–311.
7.
JinTZhangWLiN, et al.Surface characterization and corrosion behavior of 90/10 copper-nickel alloy in marine environment. Materials (Basel)2019; 12: 1869.
8.
LuJCWangZBHuHX, et al.Understanding localized corrosion mechanism of 90/10 copper-nickel alloy in flowing NaCl solution induced by partial coverage of corrosion products films. Corros Sci2024; 227: 111716.
9.
LiBZZhangZQQiuZH, et al.Insight to corrosion mechanism of 90/10 copper-nickel alloys under different sea depths. Mater Lett2021; 303: 130513.
10.
PopplewellJMHartRJFordJA. The effect of iron on the corrosion characteristics of 90-10 cupro nickel in quiescent 3· 4% NaCl solution. Corros Sci1973; 13: 295–309.
11.
SaudSNHamzahEAbubakarT, et al.Effects of Mn additions on the structure, mechanical properties, and corrosion behavior of Cu-Al-Ni shape memory alloys. J Mater Eng Perform2014; 23: 3620–3629.
12.
GaoyongLINYuxiongZJuhuaZ, et al.Influence of rare earth elements on corrosion behavior of Al-brass in marine water. J Rare Earths2011; 29: 638–644.
13.
YangRWenJZhouY, et al.Effect of Al element on the microstructure and properties of Cu-Ni-Fe-Mn alloys. Materials (Basel)2018; 11: 1777.
14.
YangRWenJZhouY, et al.An investigation of the corrosion mechanisms of Cu-7Ni-3Al-1Fe-1Mn alloy in chloride-containing environment. J Mater Eng Perform2019; 28: 2866–2872.
15.
HanQAnSSongK, et al.Strategy for co-enhancement of corrosion resistance-strength of Cu-7Ni-3Al-1Fe-1Mn alloy: rare earth Sm microalloying. Mater Today Commun2024; 39: 109195.
16.
GaoXWuHLiuM, et al.Effect of annealing time on grain boundary characteristics of C71500 cupronickel alloy tubes with different deformation. Mater Charact2020; 169: 110603.
17.
MaSFuLMaX, et al.Ultra-strong nickel aluminum bronze alloys with ultrafine microstructures by continuous heavy hot rolling. Mater Charact2019; 158: 109986.
18.
GaoXWuHLiuM, et al.Texture and special grain boundary distribution of C71500 copper-nickel alloy tubes at different annealing temperatures. J Mater Eng Perform2021; 30: 2365–2373.
19.
FengWZhouJWangS, et al.Evolution of grain boundary character distribution in B10 alloy from friction stir processing to annealing treatment. Materials (Basel)2024; 17: 1134.
20.
YuanYJiangYZhouJ, et al.Influence of grain boundary character distribution and random high angle grain boundaries networks on intergranular corrosion in high purity copper. Mater Lett2019; 253: 424–426.
21.
ZhaoYPengLXieH, et al.Enhancing the erosion–corrosion resistance of cupronickel alloy through grain boundary engineering. Corros Sci2023; 219: 111228.
22.
WangWZhangWLiuY, et al.Tailoring microstructure of a nickel aluminium bronze by hot extrusion and its impact on mechanical and corrosion behaviour. Corros Sci2023; 215: 111049.
23.
ZengYYangFChenZ, et al.Enhancing mechanical properties and corrosion resistance of nickel-aluminum bronze via hot rolling process. J Mater Sci Technol2021; 61: 186–196.
24.
ZhangSLiuJTangM, et al.Role of rare earth elements on the improvement of corrosion resistance of micro-alloyed steels in 3.5wt.% NaCl solution. J Mater Res Technol2021; 11: 519–534.
25.
YoshihiroIMaruoYKataokaN, et al.AFM and XPS study from surfaces of native oxide/Al-metal. Procedia Eng2017; 216: 182–189.
