Effect of alkali/acid pretreatment on the topography and corrosion resistance of as-deposited CaP coating on magnesium alloys

被引：52

作者：

Jiang, Song ^{[1
]}

Cai, Shu ^{[1
]}

Lin, Yishu ^{[1
]}

Bao, Xiaogang ^{[2
]}

Ling, Rui ^{[1
]}

Xie, Dongli ^{[1
]}

Sun, Jiayue ^{[1
]}

Wei, Jieling ^{[1
]}

Xu, Guohua ^{[2
]}

机构：

[1] Tianjin Univ, Key Lab Adv Ceram & Machining Technol, Minist Educ, Tianjin 300072, Peoples R China

[2] Changzheng Hosp, Spine Surg Ctr, Dept Orthoped Surg, Shanghai 200003, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 793卷

基金：

中国国家自然科学基金;

关键词：

Magnesium alloy; Pretreatment; Microwave assisted treatment; Calcium phosphate coating; Corrosion resistance; IN-VITRO DEGRADATION; CERAMIC COATINGS; HYDROXYAPATITE; MECHANISM; BEHAVIOR; HA;

D O I：

10.1016/j.jallcom.2019.04.198

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The development of corrosion resistance biological coatings on magnesium and its alloy that can be used for controlling the degradation rate and corresponding biological properties from the surface of implants could have a significant impact in the field of bone tissue regeneration. This work reported the fabrication of quickly deposited biphasic calcium phosphate (Cal)) coatings on alkali (sodium hydroxide, NaOH) and acid (hydrofluoric, HF) pretreated magnesium alloy (AZ31) substrates using microwave assisted method. The results indicated that the pretreatment layers (formed on NaOH or HF pretreated AZ31 substrates) could protect substrates from etching of H+ during the deposition process of CaP coating. Meanwhile, different pretreatment layers have been shown to greatly influence the phase component, morphology, thickness and corrosion resistance of the resultant CaP coatings. The CaP coating based on the acid pretreatment layer was mainly composed of compact chrysanthemum-like F-doped hydroxyapatite (HA) with obvious c-axis growth orientation and exhibited excellent corrosion resistance in the simulated body fluid (SBF), which could provide more than 10 weeks of protection for magnesium alloy substrate. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：202 / 211

页数：10

共 39 条

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