EXPERIMENTAL STUDY OF THE ANTI-CORROSION EFFECT OF STRUCTURAL STEEL AH-36 UNDER CATHODIC POLARIZATION IN THE TROPICAL MARINE ENVIRONMENT

Practice of Anticorrosive Protection Pub Date : 2022-03-01 DOI:10.31615/j.corros.prot.2022.103.1-1

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Abstract

The initial result of an experimental study of the anti-corrosion effect of structural steel AH36 is shown under cathodic polarization in tropical seawater in Vietnam. In the study, various environmental sensors are used to collect data about the environment, in which the calcareous layer is formed with rapid polarization. The completion of layer formation is proved by the stabilization of the output voltage while fixing the output current of the power supply. Under the experimental condition, after the first 100…120 hours, the surface of AH-36 structural steel is completely covered with calcareous layer in the tropical marine environment. An analysis of the properties of the calcareous layer in laboratory conditions using electrochemical methods shows that the effectiveness of protection of AH-36 steel from corrosion after cathodic polarization is achieved in the first week. Maintaining a constant current density further away at a given polarization potential leads to a decrease in the effectiveness of electrochemical protection. We offer directions for studying the calcareous layer for increasing the protective efficiency and their resistance in seawater.

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热带海洋环境中ah-36结构钢阴极极化防腐效果的实验研究

对AH36结构钢在越南热带海水阴极极化条件下的防腐效果进行了初步实验研究。在研究中，利用各种环境传感器采集环境数据，其中钙质层形成，极化速度快。在固定电源输出电流的同时稳定了输出电压，证明了成层的完成。在实验条件下，在热带海洋环境中，AH-36结构钢经过前100 ~ 120小时，表面完全被钙质层覆盖。利用电化学方法在实验室条件下对石灰层的性能进行了分析，结果表明，AH-36钢在阴极极化后的第一周就取得了防腐效果。在一定的极化电位下，保持一定的电流密度会降低电化学保护的有效性。为提高钙质层在海水中的防护效率和耐蚀性提供了研究方向。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Practice of Anticorrosive Protection

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