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Enhanced corrosion resistance in Fe-based amorphous coatings through eliminating Cr-depleted zones
Wu, J; Zhang, SD; Sun, WH; Gao, Y; Wang, JQ; Wang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
2018-05-15
Source PublicationCORROSION SCIENCE
ISSN0010-938X
Volume136Pages:161-173
AbstractLocalised Cr depletion caused by defects in Fe-based amorphous coatings, e.g. pores, oxides and crystalline phases, is thought to be the dominating reason for decreasing corrosion resistance in the coatings. An electrochemical polarisation treatment was used to selectively dissolve Cr-depleted zones in the coatings. The corrosion behaviour of the coatings was studied by potentiodynamic and potentiostatic polarisation and electrochemical impedance spectroscopy in 3.5 wt.% NaCl solution. With the elimination of Cr-depleted zones the corrosion resistance of the coatings was enhanced, with an order of magnitude reduction in the passive current density together with the improvement of passive film stability.; Localised Cr depletion caused by defects in Fe-based amorphous coatings, e.g. pores, oxides and crystalline phases, is thought to be the dominating reason for decreasing corrosion resistance in the coatings. An electrochemical polarisation treatment was used to selectively dissolve Cr-depleted zones in the coatings. The corrosion behaviour of the coatings was studied by potentiodynamic and potentiostatic polarisation and electrochemical impedance spectroscopy in 3.5 wt.% NaCl solution. With the elimination of Cr-depleted zones the corrosion resistance of the coatings was enhanced, with an order of magnitude reduction in the passive current density together with the improvement of passive film stability.
description.department[wu, j. ; zhang, s. d. ; sun, w. h. ; wang, j. q.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china ; [wu, j.] univ sci & technol china, sch mat sci & engn, shenyang 110016, liaoning, peoples r china ; [gao, y.] northeastern univ, minist educ, key lab electromagnet proc mat, shenyang 110819, liaoning, peoples r china
KeywordMetallic-glass Coatings Stainless-steel Surface Distributions Erosion-corrosion Pitting Corrosion Wear-resistance Heat-treatment Sam 1651 Behavior Alloys
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Key Research and Development Program of China [2016YFB1100204]; National Natural Science Foundation of China [51471166, 51131006, 51701214]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79305
Collection中国科学院金属研究所
Corresponding AuthorWang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wu, J,Zhang, SD,Sun, WH,et al. Enhanced corrosion resistance in Fe-based amorphous coatings through eliminating Cr-depleted zones[J]. CORROSION SCIENCE,2018,136:161-173.
APA Wu, J,Zhang, SD,Sun, WH,Gao, Y,Wang, JQ,&Wang, JQ .(2018).Enhanced corrosion resistance in Fe-based amorphous coatings through eliminating Cr-depleted zones.CORROSION SCIENCE,136,161-173.
MLA Wu, J,et al."Enhanced corrosion resistance in Fe-based amorphous coatings through eliminating Cr-depleted zones".CORROSION SCIENCE 136(2018):161-173.
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