摘要
通过正交实验确定了硫酸锌、葡萄糖酸钙和 APG(C0 81 0 )复配的 3元缓蚀剂最佳复配比为4∶ 1∶ 2。用失重法测得该 3元缓蚀剂在 35 0 mg/ L时对碳钢缓蚀率为 92 .8%,但试样表面存在局部腐蚀。为了抑制试样局部腐蚀的发生 ,采用失重法从几种常用缓蚀组分中筛选出硅酸钠和钨酸钠作为 3元缓蚀剂的添加剂组成 5元缓蚀剂 ,通过正交实验确定了组分间的最佳复配比。用失重法确定了5元缓蚀剂的临界浓度为 2 80 mg/ L ,此时对碳钢缓蚀率为 93.8%,并有效抑制了局部腐蚀的发生。从而得到了天然海水中 1种有效抑制碳钢局部腐蚀的低毒、高效复合缓蚀剂。据极化曲线分析可以确定该 5元缓蚀剂是 1种抑制阳极过程为主的混合型缓蚀剂。
The best weight ratio of calcium gluconate, ZnSO 4 and APG was studied by Latin experiment. Local corrosion was found on mild steel after this three-compound corrosion inhibitor was added. In order to prevent local corrosion Na 2SiO 3 and Na 2WO 4 were added to form a five-compound corrosion inhibitor. The best weight ratio of calcium gluconate,ZnSO 4,APG,Na 2SiO 3 and Na 2WO 4 was studied by Latin experiment too. The critical concentration of the five-compound corrosion inhibitor was studied by weight loss. The inhibitor can inhibit local corrosion well at the critical concentration. In this way, a kind of high effect corrosion inhibitor was obtained.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第2期238-244,共7页
Periodical of Ocean University of China
基金
山东省教育厅第三批科技计划项目 (J0 2 C5 2 )资助
关键词
缓蚀剂
天然海水
碳钢
局部腐蚀
APG
corrosion inhibitor
natural seawater
mild steel
local corrosion
