CAJ | 학술논문

　　在含有EDTA-Ca和Na2HPO4的电解液中，以恒电流方式制备富含Ca和P的镁合金微弧氧化陶瓷膜，研究电流密度对陶瓷膜结构及耐蚀性的影响。利用涂层测厚仪、X-射线荧光光谱仪（XRF）、X-射线衍射仪（XRD）、扫描电子显微镜（SEM）及电化学工作站对陶瓷膜厚度、元素组成、相组成、表面形貌及膜层在Hank溶液中的耐蚀性进行了测试。结果表明：随着电流密度的增加，膜层的厚度及 Ca/P 均呈现先增加后减小的趋势；膜层主要由 MgO 及 MgAl2O4组成，膜层中的Ca，P以非晶形式存在；陶瓷膜均呈现典型的微弧氧化形貌，随着电流密度的增加，孔径逐渐增大，分布逐渐趋于不均匀，甚至出现裂痕；电流密度为100 mA/cm2，MgAl2O4含量最高，膜层的耐蚀性最佳。
　　재함유EDTA-Ca화Na2HPO4적전해액중，이항전류방식제비부함Ca화P적미합금미호양화도자막，연구전류밀도대도자막결구급내식성적영향。이용도층측후의、X-사선형광광보의（XRF）、X-사선연사의（XRD）、소묘전자현미경（SEM）급전화학공작참대도자막후도、원소조성、상조성、표면형모급막층재Hank용액중적내식성진행료측시。결과표명：수착전류밀도적증가，막층적후도급 Ca/P 균정현선증가후감소적추세；막층주요유 MgO 급 MgAl2O4조성，막층중적Ca，P이비정형식존재；도자막균정현전형적미호양화형모，수착전류밀도적증가，공경축점증대，분포축점추우불균균，심지출현렬흔；전류밀도위100 mA/cm2，MgAl2O4함량최고，막층적내식성최가。
The ceramic films containing Ca and P were prepared in an electrolyte containing EDTA?Ca and Na2HPO4 by micro?arc oxidation with constant current mode. The effects of current density on the microstructure and corrosion resistance of the oxide films were investigated. The thickness,element composition,phase composition,surface morphology and corrosion resistance of the oxide films in Hank’s solution were analyzed by coating thickness gauge,X?ray fluorescence(XRF),X?Ray diffraction (XRD),scanning electron microscopy(SEM)and electrochemical workstation. The results show that with current density increasing,the thickness and Ca/P of the oxide films increase first and then decrease. The oxide films are mainly composed of MgO and MgAl2O4,and Ca and P inside the oxide layer exist with amorphous phase. As the current density increases,the films exhibit typically crater?like structure,and the pore diameter increases with uneven distribution until crack occurs. When the current density is 100 mA/cm2,the content of MgAl2O4 in the oxide film reaches the highest,and corrosion resistance of the films is optimum.