Investigations of Local Corrosion Behavior of Plasma-Sprayed FeCr Nanocomposite Coating by SECM |
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| Authors: | Xi Shi Mingyong Shu Qingdong Zhong Junliang Zhang Qiongyu Zhou Quoc Binh Bui |
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| Affiliation: | 1.State Key Laboratory of Advanced Special Steels,Shanghai University,Shanghai,China;2.School of Materials Science and Engineering,Jiangxi University of Science and Technology,Ganzhou,China;3.Vietnam Maritime University,Haiphong,Vietnam |
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| Abstract: | FeCr alloy coating can be sprayed on low-carbon steel to improve the corrosion resistance because of FeCr alloy’s high anti-corrosion capacity. In this paper, Fe microparticles/Cr nanoparticles coating (NFC) and FeCr microparticles coating (MFC) were prepared by atmospheric plasma spraying and NFC was heat-treated under hydrogen atmosphere at 800 °C (HNFC). EDS mapping showed no penetration of Ni in MFC and NFC while penetration of Ni occurred in HNFC. X-ray diffraction results indicated the form of the NiCrFe (bcc) solid solution in HNFC. SECM testing in 3.5 (wt.%) NaCl revealed that the anti-corrosion capacity of NFC improved compared with MFC, while HNFC improved further. |
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