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Structure and Growth Mechanism of Lanthanum Chromate Fu Guifu1,Ao Qing1,Liu Weiming1,SUN Liangcheng1,Li Shengli1,Ling Ziyu1 (1.Department of Materials Science and Engineering, Shandong University, Jinan 250061, China;2.Baotou Rare Earths Institute, Baotou 014010, China) Abstract:The unit cell of lanthanum chromate was constructed by calculating equivalent points. By means of calculation......
of ACR from chromate industry. Key words: utilization; aluminum-chromate residue(ACR); aluminum hydroxide; sodium chromate hydrate ...%, Al(OH)3 8%-15%, and H2O 50%-65%) is generated when 1 t sodium chromate is produced. The ACR is composed of aluminum tri-hydrate and amount of sodium chromate with virulent Cr(Ⅵ) that causes severe......
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A novel method to produce potassium chromate from carbon ferrochromeHU Guo-rong(胡国荣), WANG Jia-liang(王家良), PENG Zhong-dong(彭忠东), DU Ke(杜柯) (School of Metallurgy and Environment, Central South...%. Therefore, it can be easily recovered to produce sponge iron, realizing zero-emission of chromium residue.Key words:carbon ferrochrome; potassium chromate; two-stage roasting; chromium residue; zero......
Rare earth and silane as chromate replacers for corrosion protection on galvanized steel PENG Tianlan1,MAN Ruilin1 (1.School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China) Abstract:The present work aimed at using rare earth lanthanum salt and trimethoxy(viny)silance as chromate substitutes for galvanized steel passivation, in contrast to zinc coating......
Post treatment of silane and cerium salt as chromate replacers on galvanized steel WU Haijiang1,LU Jintang1,KONG Gang1 (1.School of Materials Science and Engineering, South China University... in the corrosion process, and the corrosion protection of the complex film was much better than that of single cerium film or silane film and closed to that of chromate film, because the polarization......
Rare earth and silane as chromate replacers for corrosion protection on galvanized steel彭天兰,满瑞林摘 要:The present work aimed at using rare earth lanthanum salt and trimethoxy(viny)silance as chromate substitutes for galvanized steel passivation, in contrast to zinc coating samples treated with chromate.The corrosion resistance was assessed......
Post treatment of silane and cerium salt as chromate replacers on galvanized steel孔纲,卢锦堂,吴海江摘 要:A complex film on hot-dip galvanized steel sheet(HDG... that of single cerium film or silane film and closed to that of chromate film, because the polarization resistance Rp and electrochemical impendence were increased markedly.Microstructure and chemical......
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·SiO2, respectively. Key words: chromite ore; oxidative roasting; thermodynamics; sodium chromate 1 Introduction Soda-ash roasting of the chromite mineral is almost the unique method used worldwide for the production of water soluble sodium chromate [1]. The soda-ash roasting process is divided into lime-based roasting process and lime-free roasting process according to the composition of filler......
