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首页> 外文期刊>Corrosion science >Resistance of Mo-bearing stainless steels and Mo-bearing stainless-steel coating to naphthenic acid corrosion and erosion-corrosion
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Resistance of Mo-bearing stainless steels and Mo-bearing stainless-steel coating to naphthenic acid corrosion and erosion-corrosion

机译：含钼不锈钢和含钼不锈钢涂层对环烷酸腐蚀和侵蚀腐蚀的抵抗力

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摘要

Naphthenic acid corrosion (NAC) and erosion-corrosion (NAEC) behavior of Mo-bearing (0-7.0 wt.%) stainless steels have been investigated in laboratory to evaluate the essential role of Mo on their NAC and NAEC resistance. The NAC and NAEC resistance of a high-velocity-oxygen-fuel (HVOF) thermal sprayed Mo-bearing stainless-steel coating was also investigated in both laboratory and an oil refinery. It was found that increasing the Mo content remarkably enhanced the NAC and NAEC resistance of stainless steels. The Mo-rich areas or phases in the steels played an importance role in resisting the NAEC. The HVOF coating showed excellent NAC and NAEC resistance in laboratory tests. The 700-day field test in an oil refinery revealed that the coating can effectively prevent the carbon-steel substrate from erosion-corrosion during long-term exposure in oil-refining environment. The corresponding NAC and NAEC mechanisms of the stainless steels and the beneficial role of Mo were discussed by taking account of inherent susceptibility of metal elements to corrosion, possible effects of Mo on surface films, and Mo-induced change in microstructure and microhardness.
机译：含钼（0-7.0 wt。％）不锈钢的环烷酸腐蚀（NAC）和腐蚀腐蚀（NAEC）行为已在实验室进行了研究，以评估钼在其NAC和NAEC耐性中的重要作用。还在实验室和炼油厂中研究了高速氧燃料（HVOF）热喷涂含钼不锈钢涂层的耐NAC和NAEC性能。发现增加Mo含量显着增强了不锈钢的耐NAC和NAEC性能。钢中的富钼区或相在抵抗NAEC方面起着重要作用。 HVOF涂层在实验室测试中显示出出色的NAC和NAEC耐性。在炼油厂进行的为期700天的现场测试表明，该涂层可以有效防止碳钢基底在炼油环境中长期暴露期间受到腐蚀腐蚀。通过考虑金属元素固有的腐蚀敏感性，Mo对表面膜的可能影响以及Mo引起的显微组织和显微硬度的变化，讨论了不锈钢的相应NAC和NAEC机理以及Mo的有益作用。

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