检索结果-南通市图书馆

Effect of Pyrrole and N-Methylpyrrole Coatings on Corrosion Resistance of Mild Steel

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 1137-1141页

作者： Ali Ashrafi M.A.golozar S.Mallakpour Ali Ghasemi Department of Materials Engineering Isfahan University of Technology Isfahan 84154 Iran Organic Polymer Chemistry Research Laboratory College of Chemistry Isfahan University of Technology Isfahan 84156 Iran

Electrochemical polymerizations of various ratios of pyrrole and methylpyrrole monomers were performed in aqueous toluene-4-sulfinic acid sodium salt (T4SNa) electrolyte, using galvanostatic method. pH of electrolyte was adjusted by p-toluene sulfonic acid (PTSA). In order to prevent corrosion of mild steel substrates during coating deposition, specimens were pretreated in 0.5M oxalic acid solution, employing galvanostatic method. This would passivate the steel substrate and facilitate the coating process as well. Corrosion resistance of coated substrates was investigated in 1M NaCl solution using Tafel polarization technique. In addition, using scanning electron microscopy (SEM), morphological characterization of coatings produced, was investigated. Regarding the corrosion characteristics, results obtained revealed that the ratio of 1 to 1 (Pyrrole/Methylpyrrole) could play an important role.

关键词：导电聚合物电引发聚合吡咯耐蚀性低碳钢

Effect of Catalyst on the Formation of Silica Coating on Nickel Substrate by Sol-Gel Processing

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 1295-1298页

作者： Ali Ghasemi F.Ashrafizadeh M.A.golozar AH Ashrafi Materials Engineering Department Isfahan University of Technology Isfahan IranMaterials Engineering Department Isfahan University of Technology Isfahan IranMaterials Engineering Department Isfahan University of Technology Isfahan IranMaterials Engineering Department Isfahan University of Technology Isfahan Iran

In this research work silica coating was produced on nickel substrates by a sol-gel process. In order to increase the rate of hydrolysis and to reduce the rate of polymerization several acid catalysts including nitric acid-hydrochloric acid, acetic acid, hydrochloric acid and nitric acid were add to silica sol. Conversely, in order to control the rate of hydrolysis and to increase the rate of polymerization, basic catalyst of ammonia and ammonia hydroxyl were introduced in to the solution. Nickel specimens of known surface roughness were chemically cleaned and prepared by dipping in the sols. In order to produce a suitable silica coating the drying and firing cycles were optimized on these substrates. The structure and uniformity of the coatings produced were examined by scanning electron microscopy. Coatings composition was determined using glow discharge optical spectroscopy and EDAX microanalysis. Experimental result showed that hydrochloric acid, acetic acid, ammonia and acetic acid - ammonia are suitable catalytic agents for silica coating formation on nickel type substrate.

关键词：溶胶凝胶催化剂镍合金硅涂覆

Effect of Catalyst on the Formation of Silica Coating on Nickel Substrate by Sol -Gel Processing

在线全文

学校读者我要写书评

暂无评论

Effect of Catalyst on the Formation of Silica Coating on Nic...

空腹和非空腹测低密度脂蛋白胆固醇的准确性比较

14～(th) Congress of International Federation for Heat Treament and Surface Engineering

作者： Ali Ghasemi F.Ashrafizadeh M.A.golozar Ali Ashrafi Materials Engineering Department Isfahan University of TechnologyIsfahanIran Materials Engineering Department Isfahan University of TechnologyIsfahanIran Materials Engineering Department Isfahan University of TechnologyIsfahanIran Materials Engineering Department Isfahan University of TechnologyIsfahanIran

＜正＞ In this research work silica coating was produced on nickel substrates by a sol-gel process. In order to increase the rate of hydrolysis and to reduce the rate of polymerization several acid catalysts including nitric acid-hydrochloric acid, acetic acid, hydrochloric acid and nitric acid were add to silica sol. Conversely, in order to control the rate of hydrolysis and to increase the rate of polymerization, basic catalyst of ammonia and ammonia hydroxyl were introduced in to the solution. Nickel specimens of known surface roughness were chemically cleaned and prepared by dipping in the sols. In order to produce a suitable silica coating the drying and firing cycles were optimized on these substrates. The structure and uniformity of the coatings produced were examined by scanning electron microscopy. Coatings composition was determined using glow discharge optical spectroscopy and EDAX microanalysis. Experimental result showed that hydrochloric acid, acetic acid, ammonia and acetic acid - ammonia are suitable catalytic agents for silica coating formation on nickel type substrate.

关键词： sol-gel silica coating catalyst

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

中华高血压杂志 2017年第11期25卷 1099-1099页

作者： Sathiyakumar V Park J golozar a Lazo M Quispe R Guallar E Blumenthal RS Jones SR Martin SS 黄洁叶鹏

近期研究表明，非空腹测血脂可能影响低密度脂蛋白胆固醇（10w—density lipoprotein—cholesterol，LDL-C）的评估。LDDC新的评估方法（the novelmethod of LDL—Cestimation，LDL—CN）使用一个较灵活的方法来导出患者特异的三酰甘油... 详细信息

近期研究表明，非空腹测血脂可能影响低密度脂蛋白胆固醇（10w—density lipoprotein—cholesterol，LDL-C）的评估。LDDC新的评估方法（the novelmethod of LDL—Cestimation，LDL—CN）使用一个较灵活的方法来导出患者特异的三酰甘油与极低密度脂蛋白胆固醇（verylow—density lipoprotein—cholesterol，VLDL）的比值。

关键词：极低密度脂蛋白胆固醇非空腹评估方法三酰甘油 LDL