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
	Weng Kin, W. K.; Chan, M.C.; Kwok, C. T.; Lo, K.H.
	2012-10-01
Source Publication	Corrosion and Protection
ISSN	1005-748X
Pages	55-61
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	10507
Document Type	Journal article
Collection	DEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Recommended Citation GB/T 7714	Weng Kin, W. K.,Chan, M.C.,Kwok, C. T.,et al. Laser Surface Modification of Lean-alloyed Austenitic Stainless Steel for Corrosion Resistance[J]. Corrosion and Protection, 2012, 55-61.
APA	Weng Kin, W. K.., Chan, M.C.., Kwok, C. T.., & Lo, K.H. (2012). Laser Surface Modification of Lean-alloyed Austenitic Stainless Steel for Corrosion Resistance. Corrosion and Protection, 55-61.
MLA	Weng Kin, W. K.,et al."Laser Surface Modification of Lean-alloyed Austenitic Stainless Steel for Corrosion Resistance".Corrosion and Protection (2012):55-61.

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