等离子体纳米涂层316L不锈钢在含白蛋白和溶菌酶的电解质中的耐腐蚀性电化学研究。
Electrochemical study on the corrosion resistance of plasma nanocoated 316L stainless steel in albumin- and lysozyme-containing electrolytes.
作者信息
Jones John Eric, Chen Meng, Chou Ju, Yu Qingsong
机构信息
Center for Surface Science and Plasma Technology, Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri 65211, USA.
Nanova, Inc., Columbia, Missouri 65211, USA.
出版信息
Curr Top Electrochem. 2017;19:1-15.
The physiological corrosion resistance of plasma nanocoated 316L stainless steel was studied in protein-containing electrolytes using electrochemical methods. Plasma nanocoatings with thicknesses of 20-30 nm were deposited onto 316L stainless steel coupons in a glow discharge of trimethylsilane (TMS) or its mixture with oxygen gas under various gas ratios. The surface chemistries of the plasma nanocoatings were characterized using Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Corrosion properties of the plasma nanocoated 316L stainless steel coupons were assessed using potentiodynamic polarization, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) in phosphate-buffered saline (PBS) electrolytes that contain bovine serum albumin (BSA) or lysozyme. It was found that BSA adsorption on the plasma nanocoated 316L coupons was heavily favored. BSA adsorption on the plasma nanocoating surfaces could block charge-transfer reactions between the electrolyte and 316L substrate, and thus stabilize the 316L substrates from further corrosion. In contrast, lysozyme adsorption on the plasma nanocoated specimens was not as pronounced and mildly influenced the corrosion properties of the plasma nanocoated 316L stainless steel.
采用电化学方法，研究了等离子体纳米涂层316L不锈钢在含蛋白质电解质中的生理耐腐蚀性能。在不同气体比例下，通过三甲基硅烷（TMS）或其与氧气的混合物的辉光放电，将厚度为20 - 30nm的等离子体纳米涂层沉积到316L不锈钢试样上。使用傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）对等离子体纳米涂层的表面化学性质进行了表征。在含有牛血清白蛋白（BSA）或溶菌酶的磷酸盐缓冲盐水（PBS）电解质中，使用动电位极化、循环伏安法（CV）和电化学阻抗谱（EIS）评估了等离子体纳米涂层316L不锈钢试样的腐蚀性能。结果发现，BSA在等离子体纳米涂层316L试样上的吸附非常有利。BSA在等离子体纳米涂层表面的吸附可以阻止电解质与316L基底之间的电荷转移反应，从而使316L基底稳定，防止进一步腐蚀。相比之下，溶菌酶在等离子体纳米涂层试样上的吸附不那么明显，对等离子体纳米涂层316L不锈钢的腐蚀性能影响较小。
Zotero 插件