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that the corrosion characterization of copper in thermal flow system is pitting corrosion. The morphology characterizations of metal corrosion process can be described using the proposed surface model. The generation and development of copper pitting process can be observed clearly. Key words: corrosion; corrosion morphology; Gaussian filter; copper ......
be caused by pitting by chloride ions or by the applied stress. The surface film also inhibits hydrogen ingress into the metallic Mg alloy, the hydrogen being produced as part of the Mg corrosion... Magnesium stress corrosion cracking N. Winzer1, A. Atrens1, 2, W. Dietzel3, G. Song1, K. U. Kainer3 1. Materials Engineering, The University of Queensland, Brisbane, Australia 2. Swiss Federal......
200系列不锈钢耐腐蚀性能研究齐达1,李晶1,董力2,余健1(1.北京市北京科技大学 冶金与生态工程学院2.华南不锈钢技术创新有限公司,广东佛山 528041)摘 要:通过在3.5%NaCl溶液中动电位极化曲线测定及盐雾试验,对200系列不锈钢和304不锈钢的耐腐蚀性能进行了对比研究.结果发现:200系列不锈钢的耐点蚀及耐均匀腐蚀性能远低于304不锈钢,在3.5%NaCl溶液中,201,202及304不锈钢的点蚀电位分别为-32,-22,312 mV,腐蚀速率分别为0.007 1,0.006 2,0.002 6......
Science and Technology,University of science and Technology Beijing,Beijing 100083,China摘 要:Pitting corrosion of 316L stainless steel in NaCl solution... that staircase potential electrochemical impedance spectroscopy is an effective method for the investigation of pitting corrosion.关键词:......
, and in later phases of testing of artificially aged alloy. The synergistic effect of the inhibitor mixture was not noticed on pit formation and pit growth. Key words: aluminium alloy; pitting corrosion.... The reason for this is a favourable ratio of the strength to the density of these alloys [1]. These alloys in chloride solutions often experience localized forms of corrosion, such as pitting......
. NaOH+HCl pretreatment reduces the corrosion potential and promotes the pitting of the aluminum foils; the area and density of pit etching on the aluminum surface increase after pretreatment, and the uniformity of pitting also increases significantly. Key words: high voltage aluminum foil; final-annealing; pretreatment; corrosion pitting 高纯铝箔主要用作高压电容器的阳极材料,通过特殊的电化学腐蚀技术可以在铝箔表面腐蚀出大量的垂直于铝箔(100)表面方向的隧道孔......
to the anodic dissolution of matrix at its adjacent periphery in the neutral solution. But the self-corrosion of Al4.01(MnFeCrCu)Si0.74 occurs in the acidic solution. It is the pitting corrosion...; intergranular corrosion; pitting corrosion......
and Electrical Engineering,Zhejiang University City College摘 要:The pitting corrosion resistance of duplex stainless steels UNS S31803 annealed at different... ℃ to 1150 ℃ and decreased as the temperature further increased to 1200 ℃.The specimens annealed at 1150 ℃ exhibited the highest CPTand the best pitting corrosion resistance.The pit morphologies show......
者之间具有较大的电位差,能够分别作为阴极和阳极并构成连续腐蚀微电池,从而造成Al-Mg-Si-Cu合金发生IGC.过时效过程中,连续分布的晶界Q相或富Cu膜不断粗化,逐渐形成大间距,断续分布状态,最终不能再与PFZ形成连续腐蚀微电池,相应地,合金IGC敏感性逐渐消失,转而发生点蚀(Pitting corrosion,PC),即峰时效合金在随后过时效过程中腐蚀行为只能发生IGC→PC转变,这是目前人... precipitates and width of precipitate free zones during over-ageing. Key words: Al-Mg-Si-Cu alloys; over-ageing; precipitation; intergranular corrosion; pitting corrosion Foundation item: Projects......
Trans. Nonferrous Met. Soc. China 29(2019) 1793-1802 Through-thickness inhomogeneity of precipitate distribution and pitting corrosion behavior of Al-Li alloy thick plate Kuo ZHAO, Jian-hua LIU, Mei... of precipitate distribution and pitting corrosion behavior of 95 mm-thick 2297 Al-Li alloy rolled plate was investigated using scanning electron microscopy, transmission electron microscopy......
