共搜索到3286条信息，每页显示10条信息，共329页。用时：0小时0分0秒557毫秒
In-situ monitoring of nickel electrodeposit structure using electrochemical noise technique YANG Zhong-nian(杨仲年)1, ZHANG Zhao(张 昭) 1, LENG Wen-hua(冷文华) 1, LING Ke(凌 克) 1, ZHANG Jian-qing(张鉴清)1,2...; Abstract: The nickel electroplating process was investigated by means of electrochemical noise(EN), cyclic voltammetry in conjunction with the scanning electron microscopy(SEM......
Modeling of Fracture Toughness of Electroless Nickel (EN) Coatings K. Zangeneh1,F.Ashrafizadeh3,S.M. Monir-vaghefi3 (1.Department Of Engineering, Islamic Azad University-Saveh Branch, Saveh 39187...:In the present reserch, a model has been proposed for estimate fracture toughness of Nickel-phosphorus (EN)layers. For this purpose, high phosphorus (9%) EN coatings with thicknesses of 6, 12, 24, 36......
......
......
and tap density. Ultrafine nickel powders with submicron size and spherical shape were synthesized by the hydrazine reduction of nickel sulfate in ethanol-water solvent. The effects of reaction temperature, nucleator and flow rate of nickel sulfate solution on nickel powders properties were investigated. The nickel particles synthesized were characterized by SEM and TGA. The results show......
considerations. A Watt bath is a most popular nickel electroplating bath and boric acid is an essential ingredient for controlling a bath pH and forming smooth and ductile deposits[3]. It is worth...[4]. Therefore, it becomes necessary to find more environmentally friendly alternatives to boric acid for nickel electro- deposition. Citric acid and citrate are the reagents used chiefly as pH butter......
roasting followed by ammonia leaching[10-11] and high pressure leaching with sulfuric acid[12-16]. These methods, however, are mainly used for the recovery of nickel, generate large amounts.... [2] LEE H Y, KIM S G, OH J K. Electrochemical leaching of nickel from low-grade laterites [J]. Hydrometallurgy, 2005, 77(3/4): 263-268. [3] MCDONALD R G, WHITTINGTON B I. Atmospheric acid leaching......
......
......
as well as hematite. With the mass ratio of acid to ore increasing, the main phase in the product is Fe2(SO4)3 that can be easily dissolved with nickel sulfate in the following water leaching. Fig.5 X... ____________________________________________________________________________________________ Abstract: The application of microwave technique in the hydrometallurgy of nickel laterite ores was described. The mixture of nickel laterite ores and sulfuric acid was pre-treated......
