Purpose

This paper aims to explore the transformation process and transformation mechanism of carbon steel under the marine environment.

Design/methodology/approach

In this paper, the transformation and rust layers corrosion products on 0Cu2Cr carbon steel with different cycles coupon test was investigated and deeply explored by scanning electron microscope, energy dispersive spectrometer, X-ray diffraction.

Findings

The results showed that the thickness of rust layers grew from 71.83 µm to 533.7 µm with increasing duration of corrosion. The initial corrosion product was γ-FeOOH, then part of the γ-FeOOH continued growing, and under the capillary action, the other part of the γ-FeOOH transformed to α-FeOOH.

Originality/value

To the best of the authors’ knowledge, this paper puts forward for the first time a new viewpoint of the development of corrosion products of low-carbon steel in two ways. This discovery provides a new idea for the future development of steel for marine engineering.

中文翻译：

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海洋中0Cu2Cr碳钢腐蚀产物的转变

目的

本文旨在探讨碳钢在海洋环境下的转变过程及转变机制。

设计/方法/方法

本文采用扫描电镜、能谱仪、X射线衍射仪等手段对0Cu2Cr碳钢不同循环试样的相变和锈层腐蚀产物进行了研究和深入探讨。

发现

结果表明，随着腐蚀持续时间的增加，锈层的厚度从 71.83 µm 增加到 533.7 µm。初始腐蚀产物为γ-FeOOH，随后一部分γ-FeOOH继续生长，在毛细作用下，另一部分γ-FeOOH转化为α-FeO​​OH。

原创性/价值

据作者所知，本文首次从两个方面提出了低碳钢腐蚀产物发展的新观点。这一发现为未来海洋工程用钢的发展提供了新思路。