Print Email Facebook Twitter Influence of surface pretreatment on phosphate conversion coating on AZ91 Mg alloy Title Influence of surface pretreatment on phosphate conversion coating on AZ91 Mg alloy Author Zhang, Chunyan (Harbin Engineering University; Chinese Academy of Sciences) Liu, Bin (Harbin Engineering University) Yu, Baoxing (Chinese Academy of Sciences) Lu, Xiaopeng (Northeastern University China) Wei, Yong (Harbin Engineering University) Zhang, Tao (Harbin Engineering University; Chinese Academy of Sciences; Northeastern University China) Mol, J.M.C. (TU Delft (OLD) MSE-6) Wang, Fuhui (Northeastern University China) Date 2019 Abstract Surface pretreatment is generally applied before application of protective coatings on Mg alloys, which influences surface microstructure and electrochemical activity of the substrate and has an effect on the coating properties. The effect of various pretreatment processes (sand-blasting, grinding and polishing) on the microstructure and corrosion protection performance of phosphate conversion coating (PCC) on AZ91D Mg alloy was investigated in the present study. Sand-blasting cleaning significantly increases the surface roughness and electrochemical activity of the substrate, leading to formation of a porous PCC with inferior corrosion protection performance. In the case of ground/polished Mg alloy, the uniformity and corrosion resistance of the resultant conversion coating are mainly related to the surface roughness. Relatively low surface roughness of the substrate facilitates formation of a corrosion protective PCC. Subject Corrosion protectionMg alloyPhosphate conversion coatingSurface pretreatment To reference this document use: http://resolver.tudelft.nl/uuid:083af444-2039-4595-bc5a-7917090c4dd9 DOI https://doi.org/10.1016/j.surfcoat.2018.12.091 Embargo date 2019-06-22 ISSN 0257-8972 Source Surface and Coatings Technology, 359, 414-425 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2019 Chunyan Zhang, Bin Liu, Baoxing Yu, Xiaopeng Lu, Yong Wei, Tao Zhang, J.M.C. Mol, Fuhui Wang Files PDF 1_s2.0_S0257897218314166_main.pdf 3.27 MB Close viewer /islandora/object/uuid:083af444-2039-4595-bc5a-7917090c4dd9/datastream/OBJ/view