两种酰胺醇类抗生素过期药在20%醋酸中对A3钢的缓蚀效果和机理  

Inhibition Mechanism of Two Expired Amide Alcohol Antibiotics for A3 Steel in 20% Acetic Acid

作　　者：史玉璐 白玮[1] 王姿文 吴攸[1] 张苑苓 SHI Yu- lu, BAI Wei, WANG Zi-wen, WU You, ZHANG Yuan-ling(Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department- Yunnan Minzu University, Kunming 650500, Chin)

机构地区：[1]云南民族大学云南省高校民族地区资源清洁转化重点实验室,云南昆明650500

出　　处：《材料保护》2018年第2期26-30,35,共6页Materials Protection

基　　金：国家自然科学基金资助项目(51161025);云南省绿色化学与功能材料研究省创新团队项目(2011HC008);云南省教学改革项目(2013027);云南省高校绿色新能源与材料科技创新团队项目(2011UY09);2014年云南民族大学研究生创新项目(2014YJY70)资助

摘　　要：过期药对金属缓蚀作用的研究为其回收再利用提供了一个较好的方向,具有一定的环境保护意义。通过失重法、电化学法、形貌分析等方法研究了2种酰胺醇类抗生素过期药在20%醋酸中对A3钢的缓蚀和机理。结果表明:2种药物都是随着浓度的增加缓蚀率提高,并且氯霉素比甲砜霉素缓蚀效果好。动电位极化曲线表明氯霉素和甲砜霉素均属于混合型缓蚀剂,当浓度达到2.0×10^(-4)mol/L时,其对A3钢的缓蚀效率分别为57.0%和55.3%。这2种缓蚀剂的吸附行为均是单分子层物理吸附。The inhibition effect and mechanism of two expired amide alcohol antibiotics in 20% acetic acid were studied by means of gravimetric measurement, electrochemical measurements and morphology analysis. Results showed that the inhibition efficiency of two medicines in- creased with the increase of their concentration, and the inhibition efficiency of chloramphenicol was better than that of thiamphenicol. The po- tentiodynamic polarization curves presented that both chloramphenicol and thiamphenicol belonged to the mixed-type inhibitors. When the concentration reached 2.0 × 10-4 mol/L, the inhibition efficieneies of two medicines on A3 steel were 57.0% and 55.30/0, respectively. Besides, both of the adsorption behavior of inhibitors were single molecular layer physical adsorption.

关 键 词：缓蚀行为 醋酸 A3钢 氯霉素 甲砜霉素 

分 类 号：TG174.42[金属学及工艺—金属表面处理]