Weld quality and dynamic corrosion behavior of ship pipeline systems
Source abstract
Abstract
Three types of specimens (defect-free, with porosity defects, and with slag inclusions) were prepared via manual arc welding of Q355 steel. The effects of welding defects on the dynamic corrosion of ship pipeline systems under different conditions were revealed through macroscopic morphology, surface roughness test, atomic absorption spectroscopy test, microscopic morphology, and x-ray diffractometer detection of corrosion products. As the Cl− concentration increased, the color of the rust layer around the weld darkened, and uneven protrusions accumulated. The corrosion products are γ-FeOOH, α-FeOOH, and Fe3O4. Welding defects enhance the stratification of the rust layer and lead to more serious corrosion. Both the weld zone (WZ) and the heat-affected zone (HAZ) started from the corrosion pit and expanded, ultimately reaching into the flake corrosion zone. The degree of corrosion in the WZ was more severe than in the HAZ. The degrees of corrosion in the WZ and the HAZ of the sample with porosity defects were higher than those of the sample with slag inclusions, and the sample without defects exhibited the least corrosion.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Corrosion Behavior and Inhibition · Material Properties and Failure Mechanisms
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Transportation and Logistics Engineering, Wuhan University of Technology 1 , Hubei, Wuhan 430063,
State Key Laboratory of Maritime Technology and Safety, Wuhan University of Technology 2 , Wuhan 430063,
Reliability Engineering Institute, National Engineering Research Center for Water Transportation Safety 3 , Hubei, Wuhan 430063,
Funding
Ministry of Industry and Information Technology High Technology Ship Project
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