3种镍基合金晶间腐蚀敏感性对比  

Comparative study on intergranular corrosion sensitivity of three nickel-based alloys

作　　者：姬茹一 贾雅妮 JI Ruyi;JIA Yani(Machine Industry Shanghai Lanya Petrochemical Equipment Inspection Institute Co.,Ltd.,Shanghai 201620,China)

机构地区：[1]机械工业上海蓝亚石化设备检测所有限公司,上海201620

出　　处：《金属加工（热加工）》2024年第5期105-108,共4页MW Metal Forming

摘　　要：镍基合金具有较高的强度和良好的氧化性、抗腐蚀能力,但在特定环境下,易发生晶间腐蚀。由于晶间腐蚀是一种危害性很大的局部腐蚀现象,会导致设备的突然破坏,因此选择Inconel625、Inconel825、Inconel690共3种镍基合金,在硫酸铁-硫酸溶液中试验120h,计算腐蚀速率,并对3种耐蚀合金腐蚀速率进行对比。试验结果表明:镍基合金具有良好的耐晶间腐蚀性能,3种材料的抗硫酸铁-硫酸晶间腐蚀性能由高到低依次为Inconel690、Inconel825、Inconel625。Nickel-based alloys,as one of the representatives of special Nickel-based alloys,as one of the representatives of special stainless steels,have high strength and excellent oxidation resistance and corrosion resistance.However,under specific environments,intergranular corrosion can occur easily.Intergranular corrosion is a localized corrosion phenomenon with great hazards,which can lead to sudden equipment failure.Therefore,this paper selects Inconel625,Inconel825,and Inconel690 as three kinds of nickel-based alloys for testing in ferric sulfate-sulfuric acid solution for 120 hours.The corrosion rate is calculated,and the corrosion rates of the three corrosion-resistant alloys are compared.The test results show that nickel-based alloys have good intergranular corrosion resistance.The anti-ferric sulfate-sulfuric acid intergranular corrosion performance of the three materials is ranked as follows:Inconel690,Inconel825,and Inconel625.

关 键 词：镍基合金 晶间腐蚀 腐蚀速率 化学成分 硫酸铁-硫酸 

分 类 号：TG146.15[一般工业技术—材料科学与工程]