CAJ | 학술논문

通过优化镁合金活化及浸锌前处理工艺,在前处理后的镁合金AZ31表面上实施电镀铝.采用SEM/EDX以及极化曲线等手段对镁合金表面上的膜层或镀层进行表征.结果表明,可用于离子液体电镀铝的镁合金前处理工序为碱洗、酸洗、HF活化(400 mL/L 40％ HF,10 min)、浸锌(20 min)、除水工序.通过该工序,可在镁合金表面上获得致密的浸锌层.采用TMPAC-AlCl3离子液体直流电镀铝,可获得致密的银白色电镀铝层.
통과우화미합금활화급침자전처리공예,재전처리후적미합금AZ31표면상실시전도려.채용SEM/EDX이급겁화곡선등수단대미합금표면상적막층혹도층진행표정.결과표명,가용우리자액체전도려적미합금전처리공서위감세、산세、HF활화(400 mL/L 40％ HF,10 min)、침자(20 min)、제수공서.통과해공서,가재미합금표면상획득치밀적침자층.채용TMPAC-AlCl3리자액체직류전도려,가획득치밀적은백색전도려층.
It is difficult to directly electroplate Al on Mg alloys.The effects of pretreatment parameters on the corrosion resistance of films obtained on AZ31 Mg alloy surface were studied by using potentiodynamic polarization curves,to produce a compact interfacial layer as zinc-immersion deposition.After the substrate was pretreated under optimized conditions,aluminum was electrodeposited on AZ31 from TMPAC-AlCl3 room temperature ionic liquids.The depositions were characterized by scanning electron microscope equipped with energy dispersion X-ray.The results show that the traditional pretreatment of Mg alloys was successfully used for the Al-electroplating process from TMPAC-AlCl3 ionic liquids.The entire procedure includes alkaline cleaning,chemical pickling,surface activation(400 mL/L HF acid,10 min),zinc-immersion(20 min)and anhydrous treatment.A relatively compact zinc-immersion film was prepared on the substrate surface.A silvery-colored satin aluminum deposition was obtained on AZ31 from TMPAC-AlCl3 using direct current plating.