(北京有色金属研究总院， 北京 100088)
摘 要: 对旋压及标准处理、阳极氧化和化学铣切表面处理的卷焊LF6铝合金进行深海暴露1年腐蚀试验。 通过腐蚀宏观和微观形貌及成分测定结果可知，旋压铝筒耐蚀性能优于卷板焊接铝筒，经阳极氧化表面处理的卷焊铝筒的耐蚀性优于标准处理和化学铣切的耐蚀性。在卷焊铝筒焊缝上基本未发生腐蚀，焊缝附近的区域却有较深的蚀坑。焊缝内第二相的规则排列及富锰相相对LF6合金基体较少是焊缝耐腐蚀的原因。
关键字: 腐蚀； 旋压； 卷焊； 表面处理
alloy with different processing and
surface treatment in deep seawater
（General Research Institute for Nonferrous Metals, Beijing 100088, P.R.China）
Abstract:The spinning samples and welding samples with standard, anodic oxidation or chemical milling surface treatment were immersed in seawater for one year. The results of corrosion morphologies and alloy composites show that corrosion resistance property of spinning samples is better than that of welding ones and corrosion resistance property of welding samples with anodix oxidation is better than that of those with standard or chemical milling. There is nearly no corrosion on the welding seam and some corrosion pits in the heat affected zone. The excellent corrosion resistance of the welding seam is due to more regular and less second phases in welding seam than that in substrate of LF6 alloy.
Key words: corrosion; spinning; welding; surface treatment
