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小型工业锅炉的局部腐蚀,已成为锅炉检验中的常见缺陷。据广州地区的不完全统计,局部腐蚀缺陷,约占锅炉年检中所发现缺陷的70%左右,排在第一位。对于腐蚀的机理及处理,有各种不同的方式。下面,笔者以广州地区最常见的一种典型缺陷——双锅筒纵置式锅炉下汽包封头底部与筒体焊缝附近的点、片状腐蚀,将我们的一些看法及几种具体处理方法提出,供大家讨论和参考。
Local corrosion of small industrial boilers has become a common defect in boiler inspection. According to incomplete statistics in Guangzhou, partial corrosion defects account for about 70% of the defects found in the annual inspection of the boiler, ranking first. There are various ways to deal with the mechanism and treatment of corrosion. The following, the author of Guangzhou in the most common kind of a typical flaw - double drum vertical drum boiler head and bottom of the weld bead near the point of flake corrosion, some of our views and several specific treatment Method proposed for discussion and reference.