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Electrochemical and Raman analysis of the corrosion products formed over hot dip galvanised steel wires exposed in different environmental sites
Corrosion Engineering, Science and Technology ( IF 1.8 ) Pub Date : 2020-05-14 , DOI: 10.1080/1478422x.2020.1763685
Gopal Ji 1, 2 , Kitty Baert 1 , Bart Allaert 3 , Annick Hubin 1 , Herman Terryn 1
Affiliation  

ABSTRACT In this work, hot-dip galvanised steel wires were exposed in Belgium and Indonesia for 4.5 years and correlation of corrosion products formed on the exposed wires with their corrosion properties was studied. Corrosion products were identified with local Raman analysis and correlated with corrosion activity based on odd random phase electrochemical impedance spectroscopy and Tafel behaviour. Raman spectroscopy results confirmed that corrosion products formed in both atmospheric conditions differed either in quantity and/or in chemical nature, which indicated that ‘aged in Belgium’ and ‘aged in Indonesia’ wires did not have similar surface compositions. The comparison of the instantaneous corrosion behaviour of pristine and aged wires based on corrosion currents (polarisation curve) and impedance values in 0.1 M NaCl and 0.1 M Na2SO4 declared that aged in Belgium (AIB) and aged in Indonesia (AII) wires exhibited different corrosion behaviour, which confirmed that corrosion products formed in the environments of the exposed wires were dominating their corrosion behaviour.

中文翻译:

暴露于不同环境地点的热浸镀锌钢丝上形成的腐蚀产物的电化学和拉曼分析

摘要 在这项工作中,热浸镀锌钢丝在比利时和印度尼西亚暴露了 4.5 年,并研究了暴露钢丝上形成的腐蚀产物与其腐蚀特性的相关性。腐蚀产物通过局部拉曼分析进行鉴定,并基于奇数随机相电化学阻抗谱和塔菲尔行为与腐蚀活动相关联。拉曼光谱结果证实,在两种大气条件下形成的腐蚀产物在数量和/或化学性质上都不同,这表明“在比利时老化”和“在印度尼西亚老化”的电线没有相似的表面成分。基于腐蚀电流(极化曲线)和阻抗值在 0.1 M NaCl 和 0.1M NaCl 中的原始和老化电线的瞬时腐蚀行为的比较。
更新日期:2020-05-14
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