Effect of Cations on Protective Properties of Rust Layer Formed on Carbon Steel during Wet/Dry Cyclic Corrosion
Effect of Cations on Protective Properties of Rust Layer Formed on Carbon Steel during Wet/Dry Cyclic Corrosion
复制标题
阳离子对碳钢湿/干循环腐蚀过程中锈层防护性能的影响
DOI：
10.2320/matertrans.mt-m2019270
复制
发表时间：
2020
影响因子：
1.2
通讯作者：
S. Fujimoto
中科院分区：
文献类型：
--
作者：
Kyung;H. Tsuchiya;Koushu Hanaki;M. Yamashita;S. Fujimoto
本文提出了一种简单的方法来改变碳钢在干湿循环大气腐蚀过程中形成的锈层的形貌和组成，从而提高锈层的保护性能。通过实验室循环腐蚀试验，在碳钢上生长锈层。在循环腐蚀试验期间，在含有Mg 2 +、Al 3 +、Cu 2 +或Ni 2 +的硫酸盐溶液中进行另外的浸泡以改性锈层。在没有经受额外浸泡的参考试样中，碳钢上的锈层的形态显示出板状结构。Mg 2 +试样上的锈层由板状和针状结构组成。另一方面，其他样品进行额外的浸泡表现出颗粒状结构，虽然在Cu 2 +试样上的锈层由较细的二次粒子。Al 3 +和Ni 2 +试样上的锈层比其它试样上的锈层更致密。XRD分析表明，再浸泡改变了锈层的组成，即在所有再浸泡试样上，-FeOOH的生长得到促进，而Fe 3 O 4的生长受到阻碍。从动电位极化测量得到的腐蚀电位和腐蚀电流密度的变化与锈层的形态和组成密切相关。[doi：10.2320 /材料trans.MT-M2019270]
The present work proposed a simple approach to modify the morphology and composition of rust layers formed on carbon steel during wet / dry cyclic atmospheric corrosion, and thereby improve the protective properties of the rust layers. Rust layers were grown on carbon steel by a laboratory cyclic corrosion test. Additional immersion in sulfate solutions containing Mg 2 + , Al 3 + , Cu 2 + , or Ni 2 + was carried out during the cyclic corrosion test to modify the rust layers. The morphology of the rust layers on carbon steel in the reference specimen that was not subjected to additional immersion showed a plate-like structure. The rust layers on the Mg 2 + specimen consisted of plate-like and needle structures. On the other hand, the other specimens subjected to additional immersion exhibited particulate structures, although the rust layers on the Cu 2 + specimen consisted of fi ner secondary particles. Rust layers on the Al 3 + specimen and the Ni 2 + specimen were denser compared to the other specimens. XRD revealed that the composition of the rust layer was changed by additional immersion, that is, on all the specimens subjected to the additional immersion, the growth of ¡ -FeOOH was enhanced whereas that of Fe 3 O 4 was hindered. Variations in the corrosion potential and corrosion current density obtained from potentiodynamic polarization measurements were strongly related to the morphology and composition of the rust layers. [doi:10.2320 / matertrans.MT-M2019270]