Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract： Hydrochloric dew point corrosion (DPC) behavior of 304 and 316L stainless steels was investigated using a novel DPC simulation set-up with in situ measurements of electrochemical impedance spectroscopy and electrochemical noise. The results indicated that the DPC resistance of 316L stainless steel was superior to 304. The difference of the corrosion performance for the two stainless steels can be ascribed to the following two aspects: the ratio of Cr/(Cr+Fe) is higher and the concentration of Fe is lower in the passive film of 316L stainless steel. There exists Mo in the passive film, which can enhance its pitting resistance of 316L stainless steel.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract： Effect of pre-treatment processes including acid pickling and acid pickling plus alkaline cleaning on the corrosion resistance of achromium-free zirconate-titanate based conversion coating on AZ91D magnesium alloy was systematically investigated. The results indicated that the acid pickling could induce the preferential dissolution of α phase and thereby increase the surface roughness of AZ91D magnesium alloy, but which was not conductive to the enhancement of the corrosion resistance of the conversion coating. However, the acid pickling plus alkaline cleaning could appropriately modulate the surface chemical state of AZ91D magnesium alloy, and therefore effectively improve the corrosion resistance of the zirconate-titanate based conversion coating.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract： none
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract： Dew point corrosion (DPC) behavior of rolling Q235 steel was investigated using simulative equipment and electrochemical noise. The results indicated that mass loss of Q235 steel along the rolling direction (RD) is more than that along the normal direction (ND). The main reason was that the cementite was not so easily broken off along normal direction during the corrosion process because of the net-like characteristic of ferrite and pearlite. And weight loss resulting from galvanic corrosion in the two directions was nearly the same with each other.
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-12 Cooperative journals: 《中国腐蚀与防护学报》
Abstract：本文初步回顾了近年来电化学噪声分析方法的若干研究工作，举例介绍了电化学噪声数据直流漂移、电化学噪声时-频分析、非线性分析和模式识别等分析方法的优缺点，并对电化学噪声分析方法的发展方向进行了展望。
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-08 Cooperative journals: 《腐蚀科学与防护技术》
Abstract：本文系统研究了酸洗以及酸洗+碱洗前处理工艺对AZ91D镁合金无铬、无裂纹、低能耗钛/锆转化膜耐蚀性能的影响。研究结果表明，单独的酸洗前处理使得AZ91D镁合金表面的α相优先溶解，合金表面粗糙度增加，不利于钛/锆转化膜耐蚀性能的增加。合理地利用酸洗+碱洗调整AZ91D镁合金表面化学状态能够有效提高钛/锆化学转化膜的耐蚀性能。
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