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电解液参数对铝合金微弧氧化的影响 被引量:40
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作者 张欣宇 方明 +2 位作者 吕江川 谢广文 石玉龙 《材料保护》 CAS CSCD 北大核心 2002年第8期39-41,共3页
在氢氧化钠、铝酸钠、磷酸二氢钠体系电解液中用微弧氧化法制备铝氧化膜 ,并得到了电解液温度、浓度及氧化时间对铝氧化膜成膜的关系曲线。微弧氧化工艺处理后氧化膜的厚度可达 80 μm以上 ,显微硬度可达 1560HV。用X射线衍射 (XRD)和... 在氢氧化钠、铝酸钠、磷酸二氢钠体系电解液中用微弧氧化法制备铝氧化膜 ,并得到了电解液温度、浓度及氧化时间对铝氧化膜成膜的关系曲线。微弧氧化工艺处理后氧化膜的厚度可达 80 μm以上 ,显微硬度可达 1560HV。用X射线衍射 (XRD)和扫描电镜 (SEM)分析 ,观察了氧化膜层相结构和表面形貌。通过耐腐蚀试验可知 。 展开更多
关键词 电解液参数 铝合金 微弧氧化 影响 氧化膜
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Oxygen pressure acid leaching of Gacun complex Cu concentrates
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作者 XU Bin ZHONG Hong JIANG Tao 《Journal of Central South University》 SCIE EI CAS 2012年第1期71-76,共6页
The treatment of the Gacun complex Cu concentrate with high contents of Pb,Zn,Ag,etc by oxygen pressure acid leaching was studied.It is unusual that tetrahedrite,whose treatment was rarely studied,is the primary coppe... The treatment of the Gacun complex Cu concentrate with high contents of Pb,Zn,Ag,etc by oxygen pressure acid leaching was studied.It is unusual that tetrahedrite,whose treatment was rarely studied,is the primary copper mineral of the concentrates.Most of silver also occurs in the mineral.The optimum operating parameters of oxygen pressure acid leaching were established by conditional tests.Pilot scale test was carried out under the parameters,and the leaching rates of copper and zinc are as high as 97.10% and 89.83% while lead and silver are transformed into sulfate and sulfide respectively and stay in leaching residue.The copper and zinc in lixivium were reclaimed by extraction-electrowinning and purification-electrowinning,respectively,and the lead and silver in the residue were reclaimed separately by chloride leaching and thiourea leaching.The extraction rate of copper achieves 96%,and the leaching rates of lead and silver reach 90% and 95%,respectively. 展开更多
关键词 complex Cu concentrates oxygen pressure acid leaching synthetic reclaiming TETRAHEDRITE
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