Corrosion Properties and Hydrogen Permeation of Structural steel

• Main Authors: Ou, Keh Chyn, 歐克勤
• Other Authors: WU JIANN-KUO
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/36875446180147789475

碩士 === 國立海洋大學 === 材料工程研究所 === 84 === The first part of this study is concerned the corrosion rates and corrosion prevention of harbor structure materials in Keelung harbor.The second part,the effects of calcareous deposits formation on the hydrogen absorption of steel were investigated. Low carbon steel showed lower corrosion rates in deeper seawater,and immunize corrosion by coupling sarcifial anode or applying antifouling paint after 3、 6 and 10 months exposure in seawater respectively. Stainless steel was susceptable to pitting due to biofouling and crevice under plastic washer in seawater.Hydrogen permeation transients for steel in synthetic seawater were measured at 25℃ as a function of cathodic charging current density.The effects of applied cathodic current density and main mineral contents(Ca , HCO , Mg)of synthetic seawater on the hydrogen permeation rate were investigated. The permeation rates show a descending trend as the formation of Ca-rich deposit on steel surface in synthetic seawater.