Three new Dawson-type HPCs:K14·24H2O,K15H3·26H2O and K15H3·27H2O were synthesized for the first time.They are tungstophosphoric and molybdotungstophosphoric HPCs substituted by Ni or Cu.The intermediate...Three new Dawson-type HPCs:K14·24H2O,K15H3·26H2O and K15H3·27H2O were synthesized for the first time.They are tungstophosphoric and molybdotungstophosphoric HPCs substituted by Ni or Cu.The intermediate product K10Na2H2P2W16O60 was synthesized from Na2WO4·2H2O and Na4HPO4·12H2O.The structures of the compounds were confirmed by IR,UV,XAFS and elemental analysis.展开更多
文摘采用电化学方法结合扫描电子显微镜研究了钛元素取代对Cu46Zr46(Al1-xTix)8(0≤x≤1)块体非晶合金腐蚀性能的影响。试验结果表明,对于基体Cu46Zr46Al8非晶合金,浸泡处理降低了其抗腐蚀能力,在3. 5%Na Cl溶液中其开路电位和腐蚀电流密度分别由浸泡前的-428 m V和4. 31×10-6A/cm2变为浸泡后的-439 m V和2. 75×10-5A/cm2。钛元素取代对Cu46Zr46(Al1-xTix)8块体非晶合金在中性溶液中的腐蚀性能并没有起到明显的改善作用。然而,Cu46Zr46(Al1-xTix)8块体非晶合金在碱性Na OH溶液中却具有较好的抗腐蚀能力,这与其发生钝化现象有关。
文摘Three new Dawson-type HPCs:K14·24H2O,K15H3·26H2O and K15H3·27H2O were synthesized for the first time.They are tungstophosphoric and molybdotungstophosphoric HPCs substituted by Ni or Cu.The intermediate product K10Na2H2P2W16O60 was synthesized from Na2WO4·2H2O and Na4HPO4·12H2O.The structures of the compounds were confirmed by IR,UV,XAFS and elemental analysis.
