title: Corrosion behavior of mesoporous bioglass-ceramic coated magnesium alloy under applied forces.
abstract: In order to research the corrosion behavior of bioglass-ceramic coated magnesium alloys under applied forces, mesoporous 45S5 bioactive glass-ceramic (45S5 MBGC) coatings were successfully prepared on AZ31 substrates using a sol-gel dip-coating technique followed by a heat treatment at the temperature of 400°C. In this work, corrosion behavior of the coated samples under applied forces was characterized by electrochemical tests and immersion tests in simulated body fluid. Results showed that the glass-ceramic coatings lost the protective effects to the magnesium substrate in a short time when the applied compressive stress was greater than 25MPa, and no crystallized apatite was formed on the surface due to the high Mg(2+) releasing and the peeling off of the coatings. Whereas, under low applied forces, apatite deposition and crystallization on the coating surface repaired cracks to some extent, thus improving the corrosion resistance of the coated magnesium during the long-term immersion period.
authors.affiliation: Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, People׳s Republic of China.
authors.forename: Feiyang
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, People׳s Republic of China. Electronic address: caishu@tju.edu.cn.
authors.forename: Shu
authors.initials: S
authors.lastname: Cai
authors.affiliation: Shanghai Changzheng Hospital, Shanghai 200003, People׳s Republic of China. Electronic address: xuguohuamail@163.com.
authors.forename: Guohua
authors.initials: G
authors.lastname: Xu
authors.affiliation: Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, People׳s Republic of China.
authors.forename: Sibo
authors.initials: S
authors.lastname: Shen
authors.affiliation: Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, People׳s Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, People׳s Republic of China.
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Shanghai Changzheng Hospital, Shanghai 200003, People׳s Republic of China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Wu
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D019245:Compressive Strength; D003343:Corrosion; D004563:Electrochemistry; D008274:Magnesium / Q000737:chemistry*; D008422:Materials Testing; D008903:Minerals / Q000737:chemistry; D016062:Porosity; D013314:Stress, Mechanical; D013696:Temperature
chemical_list: D000497:Alloys; C022107:Bioglass; D008903:Minerals; D008274:Magnesium
keywords: AZ31 magnesium alloy; Applied forces; Corrosion behavior; Mesoporous bioglass-ceramic coating