Degradation of unconventional fluoride conversion coating on AZ61 magnesium alloy in SBF solution

被引：23
作者：
Fintova, Stanislava [1 ,2 ]
Drabikova, Juliana [2 ,3 ]
Hadzima, Branislav [3 ]
Trsko, Libor [3 ]
Brezina, Matej [2 ]
Dolezal, Pavel [2 ,4 ]
Wasserbauer, Jaromir [2 ]
机构：
[1] Acad Sci Czech Republ, Inst Phys Mat, Zizkova 22, Brno 61662, Czech Republic
[2] Brno Univ Technol, Fac Chem, Mat Res Ctr, Purkynova 464-118, Brno 61200, Czech Republic
[3] Univ Zilina, Univ 8215-1, Zilina 01026, Slovakia
[4] Brno Univ Technol, Fac Mech Engn, Inst Mat Sci & Engn, Tech 2896-2, Brno 61669, Czech Republic
来源：
SURFACE & COATINGS TECHNOLOGY | 2019年 / 380卷
关键词：
AZ61 magnesium alloy; Na[BF4; Fluoride conversion coating; Corrosion; ZN-ZR ALLOY; CORROSION-RESISTANCE; MECHANICAL-PROPERTIES; TREATED MAGNESIUM; BEHAVIOR; AZ31; FILM; CYTOCOMPATIBILITY; BIOCOMPATIBILITY; CYTOTOXICITY;
D O I：
10.1016/j.surfcoat.2019.125012
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The paper offers an analysis of the corrosion process of the AZ61 magnesium alloy protected with the unconventionally prepared fluoride conversion coating using Na [BF4] salt melt. The protection of the magnesium alloy with the coating was shown to vary depending on the preparation temperature (430 and 450 degrees C) and coating time (0.5, 2 and 8 h). Lower coating temperature and shorter coating times offer lower protection of the material against corrosion. Similar corrosion mechanism was observed for all the damaged specimens. Migration of the species from the SBF to the substrate through the coating resulted in the coating damage due to the H-2 evolution and corrosion products creation following with more pronounced corrosion attack of the substrate. However, no signs of the corrosion attack were observed when the coating was prepared at 430 degrees C for 8 h and at 450 degrees C for 2 and 8 h even after 168 h of exposure of the specimen to the simulated body fluid solution at 37 +/- 2 degrees C.
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页数：12
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