根据前面部分解释的结果,纯 Zn 在 r-SBF 中的腐蚀机制如图 12 所示。(a) 浸入初期 Zn 的溶解和 ZnO/Zn(OH)2 的形成; (b) 通过延长浸泡时间使磷酸锌和磷酸钙成核; (c) 磷酸盐的生长和腐蚀产物的增厚; (d) 腐蚀产物的部分溶解。
According to the results interpreted in previous sections, thecorrosion mechanism of pure Zn in r-SBF is proposed in Fig. 12. (a) the dissolution of Zn and formation of ZnO/Zn(OH)2 at initial stage during immersion; (b) the nucleation of zinc phosphate and calcium phosphates by extending the immersion time; (c) the growth of phosphates and thickening of the corrosion products; (d) partially dissolution of the corrosion product.