催化裂化装置用波纹管材料的耐蚀性能研究

Corrosion Resistance of Bellow Materials for Catalytic Cracking Unit

摘要: 对固溶态与冷作态的Incoloy800H、Inconel625、B 315、FN 2和3165种波纹管材料的试样在H₂S_XO₄ (连多硫酸) 及H₂S_XO₄+15%NaCl溶液中进行了应力腐蚀开裂敏感性测定。结果表明:在H₂S_XO₄中, 只有Incoloy800H材料的试样发生了应力腐蚀开裂, 且固溶态试样发生开裂的时间较冷作态长, 其它材料试样均未发生应力腐蚀开裂。除Incoloy800H外的材料在15%NaCl+H₂S_XO₄溶液中继续浸泡一定时间, 试样仍未发生应力腐蚀开裂, 但有点蚀现象产生, 且同种材料冷作态的抗点蚀的能力优于固溶态的, 不同材料的抗点蚀能力, 依次为Inconel625、B 315、FN 2和316, 逐渐降低。

Abstract: The susceptivity to stress-corrosion cracking (SCC) in H₂S_XO₄ and 15%NaCl +H₂S_XO₄ solution of Incoloy800H, Inconel625, B-315, FN-2 and 316 bellow materials in solid solution annealed and cold-worked conditions is investigated. The results show that SCC in H₂S_XO₄ occurs only in samples of Incoloy800H and later with solution annealed samples than with cold-worked samples, but pitting corrosion occurs in all samples in 15% NaCl+H₂S_XO₄ solution. For the same material, the resistance of cold-worked samples to pitting corrosion is more excellent than that of solid solution annealed samples and for different materials, the resistance to pitting corrosion reduces from Inconel625 to B-315, FN-2 and 316 in sequence.