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Calcium gluconate as corrosion inhibitor for mild steel in low chloride media

被引：0
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作者：
Rajendran, S. [1 ]
Apparao, B.V. [2 ]
Palaniswamy, N. [3 ]
机构：
[1] Department of Chemistry, GTN Arts College (Autonomous), Dindigul 624 005, Tamilnadu, India
[2] Department of Chemistry, Regional Engineering College, Warangal 506 004, Andhrapradesh, India
[3] Corros. Sci. and Eng. Division, Ctrl. Electro-Chem. Res. Institute, Karaikudi 630 006, Tamilnadu, India
来源：
| 1998年 / Inst of Materials, London, United Kingdom卷 / 33期
关键词：
Experimental; (EXP);
D O I：
10.1179/bcj.1998.33.4.315
中图分类号：
学科分类号：
摘要：
The efficiency of calcium gluconate in inhibiting the corrosion of mild steel in a neutral aqueous solution containing 60 ppm Cl-, a situation commonly encountered in cooling water systems, has been evaluated by the weight loss method. It was found that 200 ppm calcium gluconate resulted in 99% inhibition efficiency after 24 h but that this decreased to 60% after 7 days. The decrease in inhibition efficiency is attributed to the dissolution of the Fe2+-gluconate complex formed on the metal surface. The protective film formed on the metal surface consisted of an Fe2+-gluconate complex and Ca(OH)2.
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