循环盐雾试验中镀锌 x80 管道钢焊接接头的加速腐蚀行为研究

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materiali in tehnologije Pub Date : 2023-12-11 DOI:10.17222/mit.2023.946

Mengmeng Li, Hongchao Ji, Chun Han, Shengqiang Liu, Wenchao Xiao

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引用次数: 0

摘要

采用循环盐雾加速腐蚀试验研究了海洋大气环境中镀锌 X80 管线钢焊接接头的腐蚀行为。通过外观检查、扫描电镜和 EDS 对不同循环下样品的腐蚀失重、腐蚀形态和腐蚀产物进行了表征。结果表明，随着镀锌层的破裂，焊缝金属暴露八天后首先出现裂纹。随着腐蚀性液体的渗入，焊缝金属首先出现点蚀坑。在热影响区腐蚀的早期阶段，锌层的断裂程度比其他两个区域更为严重。锌层的腐蚀产物不规则堆积，出现更多凹坑，导致后期出现早期裂纹和点蚀凹坑。与前两个区域相比，基体金属的耐腐蚀性更好。

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STUDY ON THE ACCELERATED CORROSION BEHAVIOR OF A GALVANIZED X80 PIPELINE STEEL WELDED JOINT DURING A CYCLIC SALT SPRAY TEST

The corrosion behavior of galvanized X80 pipeline steel welded joints in a marine atmospheric environment was studied using the cyclic salt spray accelerated corrosion test. The corrosion weight loss, corrosion morphology and corrosion products of samples under different cycles were characterized by means of appearance inspection, SEM and EDS. The results show that with the rupture of the galvanized layer, cracks first appear when the weld metal is exposed for eight days. With the infiltration of the corrosive liquid, pitting pits first appear in the weld metal. In the early stage of corrosion in the heat-affected zone, the fracture degree of the zinc layer is more serious than that in the other two areas. The corrosion products of the zinc layer accumulate irregularly and more pits appear, resulting in early cracks and pitting pits in the later stage. Compared with the first two regions, the base metal shows better corrosion resistance.

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来源期刊

Materiali in tehnologije 工程技术-材料科学：综合

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： The journal MATERIALI IN TEHNOLOGIJE/MATERIALS AND TECHNOLOGY is a scientific journal, devoted to original papers and review scientific papers concerned with the areas of fundamental and applied science and technology. Topics of particular interest include metallic materials, inorganic materials, polymers, vacuum technique and lately nanomaterials.