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本文系统地研究了AISI4340,HY100,WELTEN60,AISIA537和A131低合金钢在开路和阴极保护电位下海水中的应力腐蚀开裂(SCC)和腐蚀疲劳(CF)行为.试验结果表明,阴极保护可以使合金钢在海水中不发生SCC的界限强度降低;而对低合金钢在海水中CF裂纹扩展速率的影响则不是单一的,与其强度及SCC的行为密切相关.指出在海洋工程结构中,应尽可能把阴极保护电位控制在规定区域的上限,同时可把海洋平台用钢的强度提高200—300MPa
In this paper, the stress corrosion cracking (SCC) and corrosion fatigue (CF) behavior of AISI4340, HY100, WELTEN60, AISIA537 and A131 low alloy steels in seawater under open circuit and cathodic protection potentials were systematically studied.The results show that the cathodic protection can make the alloy The limit strength of SCC did not decrease in seawater, while the effect of low alloy steels on the crack propagation rate in seawater was not single, which was closely related to its strength and SCC behavior. It was pointed out that in the marine engineering structure, The cathodic protection potential control in the upper limit of the prescribed area, while the strength of the marine platform steel can be increased by 200-300MPa