Magnesium alloy ultra-high porosity micro-arc oxidation coating, preparation method and application thereof

(12) J-@ t1 P? t~ 9W L ) IN bi EP il (19) P d PIT, R. ~(10) 1 K"|WhiVi4 Y (43) d VTW O 2022/165961 A1 2022 4 8 )P 11 ] (11.08.2022) WIPO T PWC0T (51) M pj'] $3r} T : 319t, Shandong 250014 (CN)o .T~Ehit(WANG, C25D 11/30 (2006.01) Xitao); +d T M F K # R 19, (21) p iN- : PCT/CN2021/084381 Shandong250014 (CN)o JTjhA4@(ZHOU,Jixue); Fi ThF M19, Shandong (22) M p: $ i p : 20214 3 ) 31 H (31.03.2021) 250014 (CN) o f *1 R N(ZHANG, Suqing); + [ (25) $ig #: T i: M F TX # R 19 ,Shandong 250014 (CN)o .Etft (WANG,Shifang); VA (26)3, : t : itTE #r4 19, Shandong 250014 (30)rt(.$R: (CN)o 3P&L(LI,lHang); +5i3 Vi fAT 202110142491.3 2021T2)A2H (02.02.2021) CN T E #4 FR 19-9, Shandong 250014 (CN) o 'j (71) $if: Ll 44 pAh h ijf f(ADVANCED ,jt(LIU, Hongtao); + dLi3T VFM T F TE MATERIALS INSTITUTE, SHANDONG ACADEMY t4[x M 19 , Shandong 250014 (CN)o Y, L OFSCIENCES) [CN/CN]; +PW O i ~f ifTF (WU, Jianhua); + Wi WT Ai:MiF #R4K E4[3 O19t, Shandong 250014 (CN) 1handong250014 (CN)0 tJ i±lli (GHOMASHCHI, Reza); L W $ l N j (72) &fl A:kjt(LI, Tao); + lid &ThVM1 FT E4 19, Shandong 250014 (CN)o Ex4 [ 19t, Shandong 250014 (CN) It*w (LENG,Zhongjun); +[LSJfi3TM uTFXt (54) Title: MAGNESIUM ALLOY ULTRAHIGH-POROSITY MICRO-ARC OXIDATION COATING, PREPARATION METHOD THEREFOR AND USE THEREOF ~(54)R Z1 (57) Abstract: A magnesium alloy ultrahigh-porosity micro-arc oxidation coating, a preparation method therefor and the use there of. After a magnesium alloy is sequentially subjected to pre-treat ment, ultrasonic cleaning, barrier film preparation, a cathodic mi cro-arc electrodepositiontreatment and an anodic micro-arc oxida tion treatment, an ultrahigh-porosity micro-arc oxidation coating having excellent bonding strength and mechanical performance can be prepared on the surface of the alloy. The porosity of the micro-arc oxidation coating is not less than 50%, and the microp ore diameter thereof is 0.5 m-3 m. In the method, various steps are sequentially carried out, the target is clear, the respective ad vantages of the cathodic micro-arc electrodepositiontreatment and the anodic micro-arc oxidation treatment are fully combined, and 1 a high-quality target coating can be formed by merely one set of power source devices. -(5 7) k_ M ~ T i TLW:-hM 1t 2 R - W~~~0MIjl~Pffl-X140&Yik~N {tk)TLW: 4-TLkT500o, iMULTLi 3_05-3pmn; it S4L Int A4W&XS _TNff ttAA. iTAJ KnH dAl T tP2 W O 2022/165961 Al11111I|||I|I|||I|||I|||I|ID |||i ||| (74)tIT) :;~~i~i~~4 MI R' 1]I(JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO.,