Development of Corrosion Resistant Steel for Coal Carrier Cargo Hold

mrmalcolm

Development of Corrosion Resistant Steel for Coal Carrier Cargo Hold

作者：

H Ikeda，K Shiotani，M Omoda，S Tsuri，T Komori

摘要：

In the coal carrier cargo hold, severe corrosion of steel occurs, and has become the cause of serious accidents in the past. From the conventional knowledge and our results of corrosive environment survey including component analysis of rust and pH measurement in corroded part in actual cargo hold and laboratory corrosion test using coal, it was concluded that dilute sulfuric acid derived from sulfur in coal caused that severe corrosion. New corrosion resistant steel for the coal carrier cargo hold was developed and its performance was investigated. As the result of laboratory corrosion test, maximum corrosion depth reduced about 30% in developed steel compared to conventional steel. This corrosion resistance was confirmed in exposure test in actual cargo hold as well. Electron Probe Micro-Analysis (EPMA) of rust layer showed that concentration of sulfur in the vicinity of interface between rust and steel substrate was smaller in developed steel than conventional steel. Transmission Electron Microscopy (TEM) observation showed that rust particle size of developed steel was about one-tenth of that of conventional steel. These results indicate that dense protective rust layer was formed in developed steel and inhibited the permeation of sulfate derived from coal to steel substrate.

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年份：

2016

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• 碧海蓝天
• 发表于2021-11-26
• 详细答案 >

qldch2306

Project of Industrial Technology for Corrosion Resistant Steel Plate for Tanker Cargo Hold "    Undertaken by Ansteel Group Passed State Acceptance 2015-10-13

Recently, the national "Twelfth Five-Year Period" Sci-Tech support plan project - "Industrial technology for corrosion resistant steel plate for tanker cargo oil hold" undertaken By Ansteel has been accepted by national ministry of science and technology. This further highlights Ansteel's unique advantages and competitive power in R&D field of marine and offshore engineering National Ministry of Science and Technology, China Iron and Steel Association and acceptance expert group have agreed that on the basis of the steel corrosion resistant index increased by more than five times the index for traditional steel. the project has broken the international technical barriers promoted the development of national steel, shipbuilding, shipping industry, created the cyclic innovation model of integration of "production, study, research, inspection, usage", established a good promotion mechanism in implementation, evaluation and demonstration of the scientific research projects, and set a model for research and application projects of other high-end materials.
    "Oil Gas Exploitation, Storage and Transportation", the key project of the national "twelfth five-year period" priority initiative Sci-Tech support plan in 2010

碧海蓝天

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mrmalcolm

碧海蓝天 发表于 2021-11-26 14:51
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