采用氧气乙炔火枪制备了4种镍含量分别为0%、2.5%、5%和8%的18K金合金,用扫描电子显微镜、能谱仪、电感耦合等果子发射光谱仪、电化学工作站和热膨胀仪研究了样品在人工汗液中的镍释放和耐腐蚀行为.研究发现,镍释放量与合金的耐腐蚀性负相关;耐腐蚀性与加工条件有关,与镍含量也存在一定的相关性;镍含量增加,原子间结合力减弱,耐腐蚀能力下降,镍释放量增加.
Four kinds of 18K gold alloys containing (mass fraction) 0%, 2.5%, 5% and 8% Ni, respectively, were prepared using an oxygen acetylene gun. The release of nickel and corrosion behavior of the samples in artificial sweat were analyzed by the inductively coupled plasma emission spectrometry (ICP-AES), electrochemical workstation, scanning electron microscopy (SEM), energy spectrometry (EDS) and dilatometer (DIL). The results show that the release of nickel from the alloy is inversely proportional to the corrosion resistance which is related to the processing conditions and the nickel content. With the nickel content increasing, the binding force between atoms weakens, leading to the corrosion of the alloys and the release of nickel.
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