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在一次停工检修期间,波纹管上的腐蚀裂纹扩展,严重开裂,出现所谓“断脖子”现象。失效主要是由连多硫酸引起的晶间应力腐蚀开裂所致。
During a down time overhaul, the corrosion crack on the bellows expanded and severely cracked, giving rise to the so-called “broken neck” phenomenon. Failure is mainly caused by multi-sulfate-induced intergranular stress corrosion cracking.