CAJ | 학술논문

经氟碳漆喷涂表面处理的铝合金建筑型材在建筑楼房安装放置一段时间后，在铝型材推拉门附近出现大量的腐蚀白斑和鼓泡现象。采用宏观检验、化学成分分析、金相组织检验、电镜微观分析以及涂层性能检测等方法对腐蚀的铝型材产品进行分析，探讨了铝型材的腐蚀机理。结果表明：铝型材腐蚀白斑主要成分除氧化铝外，含有大量氯的腐蚀物，由于铝型材表面存在大量氯元素，氯离子不断腐蚀渗透，形成腐蚀孔洞，从而造成铝型材表面腐蚀，引起铝型材的腐蚀失效。
경불탄칠분도표면처리적려합금건축형재재건축루방안장방치일단시간후，재려형재추랍문부근출현대량적부식백반화고포현상。채용굉관검험、화학성분분석、금상조직검험、전경미관분석이급도층성능검측등방법대부식적려형재산품진행분석，탐토료려형재적부식궤리。결과표명：려형재부식백반주요성분제양화려외，함유대량록적부식물，유우려형재표면존재대량록원소，록리자불단부식삼투，형성부식공동，종이조성려형재표면부식，인기려형재적부식실효。
A lot of corrosive white-spots and bubbling appeared on the surface of wrought aluminum alloy treated by PVDF coating of sliding doors of aluminium profile after the buildings were installed for a period of time.The methods of macro examination,chemical component analysis,metallographic inspection,electron microscopy analysis and coating property test and so on were applied to inspect the corrosive aluminum alloys.The corrosion mechanism of wrought aluminum alloy extruded profile was discussed.The results showed that the main components of white spots on the wrought aluminum alloy were corrosion products of chloride besides aluminum oxide.Due to plenty of chloride existing on the surface of wrought aluminum alloy,chloride ions cautiously corroded the wrought aluminum alloy and formed corrosion perforation.It caused corrosion failure of the wrought aluminum alloy extruded profile.