Corrosion Performance of Inconel 625 in High Sulphate Content

4th International Conference on Manufacturing, Optimization, Industrial and Material Engineering

Ismail, Azzura^1

Department of Materials Engineering and Design, Faculty of Mechanical and Manufacturing Engineering, UniversitiTun Hussein Onn Malaysia, BatuPahat, Johor

86400, Malaysia^1

关键词: Aggressive environment;    Breakdown potential;    Corrosion performance;    Excellent corrosion resistances;    Increasing temperatures;    Nickel-chromium-molybdenum alloys;    Passive films;    Passivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/131/1/012010/pdf
DOI  :  10.1088/1757-899X/131/1/012010

来源: IOP

【 摘 要 】

Inconel 625 (UNS N06625) is a type of nickel-chromium-molybdenum alloy with excellent corrosion resistance in a wide range of corrosive media, being especially resistant to pitting and crevice corrosion. However, in aggressive environment, Inconel 625 will suffer corrosion attack like other metals. This research compared the corrosion performance of Inconel 625 when exposed to higher sulphate content compared to real seawater. The results reveal that Inconel 625 is excellent in resist the corrosion attack in seawater. However, at increasing temperature, the corrosion resistance of this metal decrease. The performance is same in seawater with high sulphate content at increasing temperature. It can be concluded that sulphate promote perforation on Inconel 625 and become aggressive agents that accelerate the corrosion attack.