LASER SURFACE MODIFICATION OF LEAN-ALLOYED AUSTENITIC STAINLESS STEEL FOR CORROSION RESISTANCE

UM > Faculty of Science and Technology > DEPARTMENT OF ELECTROMECHANICAL ENGINEERING

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	LASER SURFACE MODIFICATION OF LEAN-ALLOYED AUSTENITIC STAINLESS STEEL FOR CORROSION RESISTANCE
	Chan, W.K.; Chan, M.C.; Kwok, C.T.; Lo, K.H.
	2012-10-01
Source Publication	Proceedings of NACE East Asia and Pacific Rim Area Conference and Expo., Shanghai, China, October 14-17, 2012
Publication Place	Shanghai
Publisher	NACE
Abstract	In order to reduce the cost of the austenitic stainless steels (ASSs), the expensive austenite former (nickel) is often substituted by manganese. However, manganese is generally seen to have a detrimental effect on the corrosion resistance. In the present study, the feasibility of laser surface modification of a lean-alloyed FeCrMn for enhancing pitting corrosion resistance was investigated. Laser surface modification of aged FeCrMn was successfully achieved by a 2.3-kW high power diode laser (HPDL). Cyclic polarization tests were performed by using a potentiostat for FeCrMn followed by subsequent laser surface modification. The pitting resistance of the laser-modified specimens was found to be significantly improved as reflected by reduction in passive current density and increase in pitting potential. This could be attributed to a more homogenous and refined microstructure and the redissolution of chromium carbides and manganese sulphide.
Keyword	laser surface melting HPDL lean-alloyed austenite stainless steel pitting corrosion citric acid passivation
Language	英語English
The Source to Article	PB_Publication
PUB ID	10515
Document Type	Conference paper
Collection	DEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Recommended Citation GB/T 7714	Chan, W.K.,Chan, M.C.,Kwok, C.T.,et al. LASER SURFACE MODIFICATION OF LEAN-ALLOYED AUSTENITIC STAINLESS STEEL FOR CORROSION RESISTANCE[C], Shanghai:NACE, 2012.
APA	Chan, W.K.., Chan, M.C.., Kwok, C.T.., & Lo, K.H. (2012). LASER SURFACE MODIFICATION OF LEAN-ALLOYED AUSTENITIC STAINLESS STEEL FOR CORROSION RESISTANCE. Proceedings of NACE East Asia and Pacific Rim Area Conference and Expo., Shanghai, China, October 14-17, 2012.

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