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Studies of Composition and Structure of CO_2 Corrosion Film of X56 Steel in the Medium of CO_2 and Salt Water 被引量:2
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作者 LIChun-fu daijia-lin +4 位作者 WANGBing ZHANGYing ZHANGXian-ju LUDong-li LUOPing-ya 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第05B期1237-1241,共5页
The X56 steel samples was corroded in the medium of salt water solution at the conditions of CO2 partial pressure POM 0.5 to 2.0 MPa, temperature 80 °C and flow rate 1.4m/s. Corrosion weigh loss, composition and ... The X56 steel samples was corroded in the medium of salt water solution at the conditions of CO2 partial pressure POM 0.5 to 2.0 MPa, temperature 80 °C and flow rate 1.4m/s. Corrosion weigh loss, composition and structure, morphology and phase of corrosion films of the samples were investigate by SEM, EDS, XRD and XPS. The results indicated that the corrosion degree was accelerated with increasing POM ? The intense localised corrosion occurred on the surface of samples. The corrosion films mainly comprised of FeCO3 and complex phase products (Fe, Ca....)COj. There exists serious pitting on the metal substrates under the corrosion film. The theoretic and experimental analyses indicate this is caused by existed micropores or micro holes in films, which have the function of mass transportation. 展开更多
关键词 X56钢 CO2腐蚀 盐水 组成结构
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Microstructure and Anticorrosion Property of AT13 Coatings Made by Combination of Nanoparticles Doping and Plasma Spraying Technique 被引量:1
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作者 LIChun-fu daijia-lin +3 位作者 WANGBin ZHANGYing HETao-e LUOPing-ya 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第05B期964-969,共6页
Al2O3+13wt%TiO2 (AT13) particles were doped with 5%~30% nanoparticles and prefabricating powders were prepared by renewed granulation. AT13 coatings were prepared on the surface of steel 45# by air plasma spraying te... Al2O3+13wt%TiO2 (AT13) particles were doped with 5%~30% nanoparticles and prefabricating powders were prepared by renewed granulation. AT13 coatings were prepared on the surface of steel 45# by air plasma spraying technique with the prefabricating powders. The microstructures of the AT13 prefabricating powders and the resulting coatings were investigated by SEM and EDS and XRD. The samples were undergone corrosion in the medium of 10% H2SO4 aqueous solution at temperature 80℃. The results indicate that the blistering time of coatings in the corrosive medium was increased with the increase of doped nanoparticle concentration while the time from blistering to spalling is independent of nanoparticle concentration. The results revealed that the structure of prefabricating powders was a twisted micrometer grade particle with dimension of 40-60μm, encapsulated by nanoparticles. The homogeneity of element distribution in coatings was improved and porosity was reduced. The phases of (Al2O3) 5.333 and orthorhombic Al2TiO5 were identified . The fracture analysis confirmed that there is a large amount of vermiculate whiskers with diameter of 10nm and length of 100~200 nm in coatings and the fracture type of coatings was the ductile trans-granular fracture. 展开更多
关键词 显微结构 等离子喷涂 纳米颗粒掺杂 防腐性能 AT13涂层
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