New approach to formation of coatings on Mg-Mn-Ce alloy using a combination of plasma treatment and spraying of fluoropolymers  

作　　者：D.V.Mashtalyar K.V.Nadaraia I.M.Imshinetskiy S.L.Sinebryukhov S.V.Gnedenkov 

机构地区：[1]Institute of Chemistry FEB RAS,159 Pr.100-letiya,Vladivostok 690022,Russia [2]Far Eastern Federal University,10 Ajax Bay,Russky Island,Vladivostok 690922,Russia

出　　处：《Journal of Magnesium and Alloys》2022年第4期1033-1050,共18页镁合金学报（英文）

基　　金：supported by the Russian Science Foundation[Grant No.20-73-00280].

摘　　要：This paper presents a method of the formation of composite polymer-containing coatings on a Mg–Mn–Ce magnesium alloy by forming a ceramic-like layer using plasma electrolytic oxidation(PEO)and subsequent spraying superdispersed polytetrafluoroethylene suspension.The coating composition and their morphological features were studied by SEM,EDS,GDOES,and XRD.The presented data confirm the embedding of fluoropolymer in the PEO coating.The evaluation of the corrosion properties of the formed composite polymer-containing coatings indicates a decrease in the corrosion current density by more than 3 orders of magnitude in comparison with the base PEO coating.The incorporation of a fluoropolymer in a PEO layer by more than 32%increases the load value at which abrasion of the coating to the substrate occurs and reduces the wear of the coating by more than 27 fold in comparison with the PEO layer.It has been established that composite coatings possess hydrophobic properties:the value of the contact angle attains 152°.

关 键 词：Plasma electrolytic oxidation Polytetrafluoroethylene Composite coatings Corrosion WEAR SUPERHYDROPHOBICITY 

分 类 号：TG174.4[金属学及工艺—金属表面处理]