용접열사이클 재현에 의한 SS400강 및 STS304강의 특성 평가 -제2보: 부식특성

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 21; no. 5; pp. 33 - 38
• Main Authors: 안석환, 최문오, 김성광, 손창석, 남기우, Ahn, Seok-Hwan, Choi, Moon-Oh, Kim, Sung-Kwang, Son, Chang-Seok, Nam, Ki-Wook
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 01.10.2007
• Subjects: 해양공학
• ISSN: 1225-0767; 2287-6715

The welding methods have been applied in the most structural products from multi-field of automobile, ship construction and construction, and so on. The structure steel must have enough strength of structure. In this study, SS400 steel and STS304 steel were used to estimate the corrosion characteristics of the weld thermal cycle simulated HAZ. To evaluate the corrosion characteristics, also, the materials with two conditions were used in 3.5% NaCl. The one is to the drawing with diameter of ${\Phi}10$ and the other is to the residual stress removal treatment. The electrochemical polarization test and immersion test were carried out. From test results, corrosion potential, corrosion current density, weight loss ratio and corrosion rate were measured. In the kinds of SS400 steels, corrosion potential of weld thermal cycle simulated specimens after the heat treatment showed somewhat the direction of noble potential. And in the base metal to be drawing weight loss ratio and corrosion rate occurred higher than the other kinds. In the kinds of STS304 steels, the result of base metal to be drawing was similar to results of SS400 steels, too. Two kinds of $750^{\circ}C$ and $1300^{\circ}C$ of weld thermal cycle simulation after the heat treatment were rather higher than the other kinds in weight loss ratio and corrosion rate.