CAJ | 학술논문

国外某电厂重油冷却器10#钢换热管使用10个月即发生腐蚀穿孔泄露。通过对腐蚀穿孔换热管管样进行内外表面宏观及微观腐蚀检测、腐蚀产物化学成分分析、电化学试验分析、腐蚀原因分析，认为换热管10#钢外表面垢下腐蚀穿孔是造成换热管泄露的重要原因。对此，建议在冷却水中添加阻垢缓蚀剂，以阻止换热管外表面结垢，引起垢下腐蚀；换热管采用耐腐蚀性能较好的TP316不锈钢。
국외모전엄중유냉각기10#강환열관사용10개월즉발생부식천공설로。통과대부식천공환열관관양진행내외표면굉관급미관부식검측、부식산물화학성분분석、전화학시험분석、부식원인분석，인위환열관10#강외표면구하부식천공시조성환열관설로적중요원인。대차，건의재냉각수중첨가조구완식제，이조지환열관외표면결구，인기구하부식；환열관채용내부식성능교호적TP316불수강。
The 10# steel exchange heat tube in a heavy oil cooler was corroded and leakage happened only after ten months’ operation. Based on a series of tests on the corroded tube, such as macroscopic and microcosmic corrosion examination, corrosion product’s chemical composition analysis, electric chemistry test analysis, corrosion reason analysis. The corrosion under scale in the 10# steel exchange heat tube outside is considered as the main reason for tube leakage. Thus, to prevent the exchange heat tube outside from scale and corrosion, it is suggested that the anti-scaling corrosion inhibitor is added to the cooling water and the TP316 stainless which corrosion resisting performance is better is used for the tube.