CAJ | 학술논문

在摩尔比为0.66:0.17:0.17的AlCl_3-NaCl-KCl共融盐中添加表面活化剂四甲基氯化铵(TMA),接通直流电在铁片上获得了Al镀层.用扫描电子显微分析、X射线衍射分析和极化曲线等技术测试镀层的表面形貌、相结构及耐腐蚀性能,并用循环伏安法研究添加TMA对Al电沉积机理的影响.研究表明,添加1.0 mass%TMA时,电镀电流效率高达93.6%;纯氯化物熔盐中所得Al晶粒呈针状,为(200)面高择优取向的面心立方结构,添加TMA后获得的Al晶粒细化且形状不规则,呈无序晶面取向.添加TMA后,Al镀层的点腐蚀电位提高了0.12 V,同时增加了电沉积反应的不可逆程度,利于Al在熔融盐中的电镀.
재마이비위0.66:0.17:0.17적AlCl_3-NaCl-KCl공융염중첨가표면활화제사갑기록화안(TMA),접통직류전재철편상획득료Al도층.용소묘전자현미분석、X사선연사분석화겁화곡선등기술측시도층적표면형모、상결구급내부식성능,병용순배복안법연구첨가TMA대Al전침적궤리적영향.연구표명,첨가1.0 mass%TMA시,전도전류효솔고체93.6%;순록화물용염중소득Al정립정침상,위(200)면고택우취향적면심립방결구,첨가TMA후획득적Al정립세화차형상불규칙,정무서정면취향.첨가TMA후,Al도층적점부식전위제고료0.12 V,동시증가료전침적반응적불가역정도,리우Al재용융염중적전도.
With the presence of tetramethylammonium chloride the aluminum coatings were obtained on iron substrate in eutectic chloride molten salt by D.C.plating.Scanning electron microscope(SEM),X-ray diffraction(XRD) and polarization curves were used to test the surface morphology,microstructure and corrosion resistance of the obtained coatings.Effect of tetramethylammonium(TMA) on Al deposition mechanism in the molten salt was investigated by cyclic voltammogram.The results showed that optimum currency efficiency of 93.6%was obtained when mass fraction of TMA reached to 1.0%.Aluminum coatings obtained in eutectic chloride molten salt is acicular and has(200) preferred orientation face-centered cubic structure,while that obtained in TMA added molten salt is irregular.Pitting corrosion potential of aluminum coating was enhanced 0.12 V and the extent of irreversibility was enlarged by adding TMA.