Na 1s和Cl 2s的峰在浸泡0.5天后在样品表面检测到。这一结果归因于NaCl从AP溶液中的粘附。腐蚀产物的化学成分没有差异，主要由Zn、N、C和O元素组成。还检测到Ca 2p、P 2p、S 2 s和S 2p的一些峰。S元素的存在证实了在样品表面形成了含有BSA的物质。

The peaks for Na 1s and Cl 2s are detected on the sample surface after 0.5 d immersion. This result is attributed to the adhesion of NaCl from AP solution. There is no difference in chemical compositions of the corrosion products, which mainly consists of Zn, N, C and O elements (Fig. 7a). In Fig. 7b, some peaks for Ca 2p, P 2p, S 2 s and S 2p are also detected. The existence of S element confirms the formation of species containing BSA on sample surfaces.