压力容器
壓力容器
압력용기
2014年
11期
21-25,31
,共6页
金属尘化%纳米划痕%临界载荷
金屬塵化%納米劃痕%臨界載荷
금속진화%납미화흔%림계재하
metal dusting%nanoscratch%critical load
为对金属尘化腐蚀层的剥落规律作进一步研究，采用纳米划痕技术对炉管材料 Cr5Mo 钢在碳氢气氛下不同腐蚀时间得到的尘化腐蚀层进行测试，得到腐蚀层与基体剥离的临界载荷。结果表明，经200 h 腐蚀的试样的腐蚀深度和临界载荷较小，经480 h 和560 h 腐蚀的试样的腐蚀深度与临界载荷显著增大，因480 h 腐蚀试样腐蚀层不均匀，其腐蚀深度与临界载荷反而比560 h 腐蚀试样更大，最外层腐蚀层较疏松，易发生剥落。
為對金屬塵化腐蝕層的剝落規律作進一步研究，採用納米劃痕技術對爐管材料 Cr5Mo 鋼在碳氫氣氛下不同腐蝕時間得到的塵化腐蝕層進行測試，得到腐蝕層與基體剝離的臨界載荷。結果錶明，經200 h 腐蝕的試樣的腐蝕深度和臨界載荷較小，經480 h 和560 h 腐蝕的試樣的腐蝕深度與臨界載荷顯著增大，因480 h 腐蝕試樣腐蝕層不均勻，其腐蝕深度與臨界載荷反而比560 h 腐蝕試樣更大，最外層腐蝕層較疏鬆，易髮生剝落。
위대금속진화부식층적박락규률작진일보연구，채용납미화흔기술대로관재료 Cr5Mo 강재탄경기분하불동부식시간득도적진화부식층진행측시，득도부식층여기체박리적림계재하。결과표명，경200 h 부식적시양적부식심도화림계재하교소，경480 h 화560 h 부식적시양적부식심도여림계재하현저증대，인480 h 부식시양부식층불균균，기부식심도여림계재하반이비560 h 부식시양경대，최외층부식층교소송，역발생박락。
For further studies on the scaling rules of metal dusting corrosion film,the critical load of ce-mentite layer scaling from base metal exposed in hydrocarbon atmosphere was measured by nanoscratch. The result shows that the depth of corrosion film and critical load of sample exposed for 200 h is small, and the values of corrosion depth and critical load of samples exposed for 480 h and 560 h obviously in-crease.Owing to the non -uniform corrosion film of the 480 h sample,the values of its corrosion depth and critical load are inversely bigger than the 560 h sample,and the outermost layer is loose,which could easily be scaled from base metal.
