葡萄糖与甘氨酸反应产物对碳钢的缓蚀效果  

Corrosion Inhibition on Carbon Steel by Reaction Products of Glucose and Glycine

作　　者：任品桥 王秀梅[1] 万晔[1] 叶天爱 邓紫嫣 王泌颖 REN Pin-qiao;WANG Xiu-mei;WAN Ye;YE Tian-ai;DENG Zi-yan;WANG Mi-ying(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168

出　　处：《材料保护》2022年第1期120-127,共8页Materials Protection

基　　金：辽宁省教育厅科研项目(lnjc202016);辽宁省兴辽英才计划项目(XLYC2002005);辽宁省大学生创新创业计划项目(201910153079)资助。

摘　　要：为了解葡萄糖与甘氨酸反应产物对碳钢的缓蚀效果,采用失重法、电化学法并结合扫描电镜观察,研究了葡萄糖与甘氨酸反应产物(PGG)对碳钢在1 mol/L HCl溶液中的腐蚀抑制作用。结果发现:PGG对碳钢表现出很好的缓蚀效果,缓蚀效率随添加浓度的增加而增加,在最大浓度250 mg/L时,表现出最好的缓蚀效果,缓蚀效率为94.7%,且缓蚀效率随温度升高而降低。PGG同时抑制了碳钢腐蚀的阴极还原反应和阳极氧化反应过程,为混合型缓蚀剂,是通过多组分的物理和化学联合吸附,在碳钢表面上形成保护性覆盖层,将碳钢与酸溶液隔离,从而起到缓蚀作用,其吸附行为遵循Langmuir吸附等温模型。葡萄糖与甘氨酸反应产物(PGG)是碳钢在1 mol/L HCl溶液中的优良缓蚀剂。In order to understand the corrosion inhibition effect of the reaction products of glucose and glycine(PGG) on carbon steel, the weight loss measurement, electrochemical techniques, and SEM observation were employed to study the corrosion inhibition of PGG on carbon steel in 1 mol/L HCl solution. Results showed that PGG showed good corrosion inhibition effect on carbon steel, and the corrosion inhibition efficiency enhanced with the increase of PGG concentration. When the highest concentration of PGG was 250 mg/L, it showed the best corrosion inhibition effect, the inhibition efficiency reached the maximum of 94.7%, which had the decreasing tendency with increasing corrosion temperature. Moreover, PGG was a mixed type corrosion inhibitor by retarding both cathodic reduction reaction and anodic oxidation reaction process of carbon steel electrode simultaneously. The good corrosion inhibition was mainly due to combination of physical and chemical adsorption of multi phase to form a protective film covering on the surface of carbon steel that isolated the carbon steel from the acid solution and thereby suppressed carbon steel corrosion. PGG adsorption on the carbon steel surface followed the Langmuir adsorption isotherm model. In general, the product of glucose and glycine(PGG) was an excellent corrosion inhibitor for carbon steel in 1 mol/L HCl solution.

关 键 词：碳钢 酸腐蚀 缓蚀剂 电化学技术 Langmuir吸附等温模型 

分 类 号：TG154.5[金属学及工艺—热处理]