在我们过去进行的酸化学清洗工作中,有时发现某些缓蚀剂导致酸洗后钢铁表面产生孔蚀,有时在样品挂钩处或沉积物下发生蚀坑,后者常归之于缝隙腐蚀,这两种局部腐蚀都是非常有害的,有必要加以研究。钢铁在中性介质中容易发生局部腐蚀的现象早已为人所共知,而且进行了大量的研究工作,但对在酸性介质中也会发生局部腐蚀,这一点却还没有引起足够的重视,虽然早在1925年Mc Culloch就报导了钢铁在稀 In our previous acid-chemical cleaning efforts, some corrosion inhibitors were sometimes found to cause pitting corrosion on steel surfaces after pickling, sometimes with pitting holes at the sample hooks or deposits, the latter being often attributed to crevice corrosion, Both localized corrosion are very harmful and need to be studied. The phenomenon of local corrosion susceptibility to steel in neutral media has long been known and a great deal of research has been done, but localized corrosion also occurs in acidic media, although it has not been given enough attention In 1925 Mc Culloch reported on the thinning of steel