51313-02476-Mechanism of O2 Concentration on CO2-O2-H2S-SO2 Corr. in the Environment of Cargo Oil Tanks

Available for download

Product Number: 51313-02476-SG

ISBN: 02476 2013 CP

Author: Wei Liu

Publication Date: 2013

Member Price: $0.00

Non Member Price: $20.00

Price: $20.00

Qty:

Corrosion resistant steels can be chosen and used as an alternative means of corrosion protection for cargo oil tanks (COTs) of crude oil tankers since the International Maritime Organization has adopted the corrosion resistant steel performance standard for corrosion protection for COTs of crude oil tankers. The corrosion behavior of the steels in unique CO2-O2-H2S-SO2 coexisting upper deck environment of COTs is closely related to the four gases concentrations. In this paper the corrosion behavior of steels used for upper deck of COTs in different O2 concentrations was investigated. The morphology microstructure and chemical compositions of corrosion scale of steels formed in different O2 concentration was analyzed and corrosion rates of steels were also obtained. The electrochemical behaviors of steel with corrosion scales formed in different O2 concentrations were investigated. Among the four corrosive gases O2 has the most important effect on corrosion behaviors of steels due to its strong oxidizability. The corrosion rates and corrosion morphologies of steels were obviously changed due to different O2 concentrations. According to the above results the effect mechanism of O2 concentration on corrosion behavior of steels in upper deck CO2-O2-H2S-SO2 environment was proposed. The research results are beneficial to understanding corrosion behavior furthur and developing corrosion resistant steels for COTs.