摘要
针对镁合金在生理环境中极易被腐蚀这一问题,以Mg-Zn-Ca合金丝为基体,采用电化学阻抗谱(EIS)、极化曲线(TAFEL)以及体外长期降解的方法研究硅烷涂层对镁合金丝的保护作用。结果表明:复合硅烷涂层(BTSE/GPTMS)对镁合金丝的保护作用最好,其阻抗从未经硅烷处理的镁合金丝的59(Ω·cm^(2))提高至1133(Ω·cm^(2)),腐蚀电流密度从1.88×10^(-4) A·cm^(-2)下降至5.19×10^(-6) A·cm^(-2);在模拟体液(SBF)中浸泡7天后,其pH值比未经硅烷处理的镁合金丝有所降低;失重率比未经硅烷处理的镁合金丝降低了14.6%。
In order to solve the problem that magnesium alloy is easy to be corrode in physiological environment,the protective effect of silane coating on magnesium alloy wire was studied by electrochemical impedance spectroscopy(EIS),polarization curve(TAFEL)and in vitro long-term degradation methods.The results show that the composite silane coating(BTSE/GPTMS)has the best protective effect on magnesium alloy wire.The impedance of BTSE/GPTMS increases from 59(Ω·cm^(2))to 1133(Ω·cm^(2)),and the corrosion current density decreases from 1.88×10^(-4) A·cm^(-2) to 5.19×10^(-6) A·cm^(-2).After soaking in simulated body fluid(SBF)for 7 days,the pH value of the magnesium alloy wire was lower than that of the magnesium alloy wire without silane treatment.The weight loss rate of magnesium alloy wire without silane treatment was reduced by 14.6%.
作者
刘荟芳
刘亚楠
陈康华
LIU Huifang;LIU Yanan;CHEN Kanghua(Light Alloy Research Institute of Central South University,Changsha Hunan 410083,China;Powder Metallurgy Institute of Central South University,Changsha Hunan 410083,China;Key Laboratory of National Defense Science and Technology of Light and high Strength Structural Materials,Changsha Hunan 410083,China)
出处
《江西化工》
2022年第6期88-93,共6页
Jiangxi Chemical Industry
关键词
镁合金丝
单一硅烷涂层
复合硅烷涂层
耐腐蚀性
magnesium alloy wire
Single silane coating
Composite silane coating
Corrosion resistance
