铝制船舶上的腐蚀的通常形式是船体钢板、船舵、船底龙骨上的局部点状腐蚀，特别是在焊缝方面。
Corrosion on Aluminum vessels is also generally in the form of localized pitting to the hull plate, rudders, bilge keels and particularly in way of weld seams.
产生缺陷的原因是运输、储存过程中与腐蚀性介质接触造成钢管局部点腐蚀。
The reason of defect generation is local spot corrosion due to contact with the corrosive medium in the transportation and storage.
结果表明，应力腐蚀是该膨胀节失效的主要原因，而局部的点蚀和残余应力、工作应力是应力腐蚀的必要条件。
The results show that the stress corrosion is the main failure causing of the bellows expansion joint, while the local pit corrosion, residual stress and the working stress is the necessary condition.
应用推荐