Open AccessFailure Analyses on Corrosion of Hot Water Tank Storage Made from Stainless Steel
Author(s) -
Tjokorda Gde Tirta Nindhia,
I Putu Widya Semara,
I Wayan Bandem Adnyana,
I Wayan Surata,
I Gusti Komang Dwijana
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1007/1/012108
Subject(s) - corrosion , welding , metallurgy , galvanic corrosion , galvanic cell , materials science , storage tank , intergranular corrosion , crevice corrosion , waste management , engineering
Hot water storage tank that was made from stainless still was investigated in this case. The tank was found failure in service due to corrosion in welded section. Corrosion also was found at the bottom part of the storage tank. The tank was used for no longer than one year but unfortunately severe corrosion was found. The purpose of this research is to find the reason why the tank easily corroded especially at the bottom part and at the welding section. The research was carried out by conducting metallographic examination directly in situ by utilizing portable metallographic microscope. It is found from investigation that the corrosion was happen due to galvanic corrosion. Investigation by using X ray fluorescence also agree that the composition of the bottom part of the tank was different with the wall, and upper section. The welding filler also was found not correctly prepared that make pitting corrosion to occur. It is suggested to conduct advance research to investigate the correct composition for the filler during welding.