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首页> 外文期刊>International Journal of Electrochemical Science >The Influence of Hypochlorite-Based Disinfectants on the Pitting Corrosion of Welded Joints of 316L Stainless Steel Dairy Reactor
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The Influence of Hypochlorite-Based Disinfectants on the Pitting Corrosion of Welded Joints of 316L Stainless Steel Dairy Reactor

机译：次氯酸盐基消毒剂对316L不锈钢乳制反应器焊接接头点蚀的影响

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摘要

The present paper reports on the investigation of a pitting corrosion phenomenon, observed in multiplelocations around the welding zone of a dairy industrial reactor, made of highly corrosion-resistant316L stainless steel (SS) material. A common practice in dairy plants involves regular disinfection ofall production equipment, typically by means of hypochlorite-based disinfecting reagents. At elevatedtemperatures, hypochlorites can produce (via a disproportionation reaction) very aggressive chlorideanions, which are able to effectively damage the passive layer present on the surface of stainless steelmaterial, thus inducing pitting corrosion. In the present work, the corrosion process (evaluated bymeans of microstructural and electrochemical techniques) became greatly enhanced by improperlycarried-out welding procedures, which resulted in metallurgically in-homogeneous SS material withpartially defected passive layer.
机译：本文报道了对点蚀腐蚀现象的研究，该点蚀现象是由高度耐腐蚀的316L不锈钢（SS）材料制成的乳品工业反应堆焊接区域周围的多个位置观察到的。奶牛场的一种常见做法是对所有生产设备进行定期消毒，通常采用基于次氯酸盐的消毒剂。在高温下，次氯酸盐会产生（通过歧化反应）非常侵蚀性的氯阴离子，它们能够有效地破坏不锈钢材料表面上存在的钝化层，从而引起点蚀。在目前的工作中，腐蚀过程（通过微观结构和电化学技术的手段进行评估）由于不正确的焊接程序而大大增强了，这导致了冶金不均匀的SS材料以及部分缺陷的钝化层。

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