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首页> 外文期刊>Journal of the Brazilian Chemical Society >Atmospheric corrosion of galvanized steel and precipitation runoff from zinc in a marine environment
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Atmospheric corrosion of galvanized steel and precipitation runoff from zinc in a marine environment

机译：海洋环境中镀锌钢的大气腐蚀和锌的沉淀径流

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This study focuses on the behavior of galvanized steel in a corrosive marine environment and on the runoff process for the same material occurring in Valparaiso, Chile. The corrosion potential and corrosion rate evaluated via mass loss were used to determine the corrosion damage to the galvanized steel. The compositions of the corrosion products were determined using X-ray diffractometry (XRD), and their morphology through scanning electron microscopy (SEM). The runoff solutions collected after rainfall were analyzed to determine the pH value, and Cl~-, SO_4~ (2-) and Zn~ (2+) ion concentrations. The results after 15 months show that the corrosion potential of the galvanized steel increases over time, indicating the formation of a protective film that consists of zinc corrosion products. These products were identified as zincite and simonkolleite. The pH values obtained for the runoff solutions are similar to those of the reference rainwater samples, and the chloride concentrations of the runoff solutions are approximately twice those of the rainwater.
机译：这项研究的重点是在腐蚀的海洋环境中镀锌钢的行为以及智利瓦尔帕莱索中相同材料的径流过程。通过质量损失评估的腐蚀电位和腐蚀速率用于确定对镀锌钢的腐蚀破坏。使用X射线衍射仪（XRD）确定腐蚀产物的组成，并通过扫描电子显微镜（SEM）确定其形态。分析降雨后收集的径流溶液，以确定pH值以及Cl〜-，SO_4〜（2-）和Zn〜（2+）离子浓度。 15个月后的结果表明，镀锌钢的腐蚀潜力随时间增加，表明形成了由锌腐蚀产物组成的保护膜。这些产品被鉴定为锌矿和新硅钙石。径流溶液的pH值与参考雨水样品的pH值相似，径流溶液的氯离子浓度约为雨水的两倍。

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