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国家自然科学基金(51071049)

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短时热处理后的2205双相不锈钢焊材的点蚀行为研究
<正>由于综合了铁素体不锈钢和奥氏体不锈钢的性能特点,双相不锈钢具有优异的耐腐蚀性、良好的可焊性及良好的力学性能,从而逐渐在化工,能源和海洋工程等领域得到广泛应用[1]。为了获得良好的耐腐蚀性和高的强度,双相不锈钢的两相...
张子英杨雁泽蒋益明李劲
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Potentiostatic Electrochemical Noise Analysis of 2101 Lean Duplex Stainless Steel in 1mol/L NaCl被引量:1
2012年
The critical pitting temperature (CPT) of 2101 lean duplex stainless steel (DSS) in 1 mol/L NaCl was investigated.Potentiostatic electrochemical noise (EN) technique coupled with scanning electron microscopy (SEM) was used to study the corrosion process of 2101 DSS at different temperatures (15,25,28,and 35 C) from below CPT to above CPT.The EN data were analyzed by wavelet technique based on orthogonal db4 wavelet.The results showed that,the patterns of current noises were different at different temperatures.The characteristics of energy distribution plot (EDP) obtained from wavelet analysis technique can be used as "fingerprints" of EN signal and can be used to interpret the corrosion process.With increasing solution temperature,the maximum relative energy defined in EDP changed from the region of crystal series coefficients with smaller scales through middle scales to larger scales,which indicated the process of initiation,propagation and growth into stable pitting of metastable pitting.The results were well confirmed by the corresponding morphologies.
Juliang XuTao SunLihua ZhangJin LiYiming Jiang
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