SUS430不銹鋼電鍍銅及電弧披覆TiCrN薄膜之表面特性研究

SUS430為肥粒體系不銹鋼之基本型，通常被製成薄板而廣泛應用於建築裝飾材料、廚房用品及家電用品等，近年來也逐漸被應用於燃料電池的雙極板，然而以燃料電池所使用雙極板來說，更需增加導電性、抗腐蝕性及改善陰極毒化來延長使用壽命，若能有效地利用表面改質的方式同時來改善其導電性與腐蝕性，則成為本計畫的主要動機。本研究目的是採用SUS 430為基材，先利用電鍍銅作為中介層，以期增加整體導電度，再利用陰極電弧沉積(Cathodic arc deposition，CAD)技術披覆TiCrN陶瓷硬膜，希望也能夠有效的增加肥粒體不銹鋼耐蝕性。CAD鍍膜實驗參數乃變化其偏壓為主，然後進行各種表面性質 (如硬度、附著性、耐腐蝕性、耐沖蝕性等)分析與比較。結果顯示，利用CAD披覆TiCrN鍍膜在SUS 430基材上，以-200V偏壓值可獲得較低的表面粗糙度、晶粒較小，且膜層較為緻密。SUS 430經由中介層電鍍銅及披覆膜層(TiN、CrN、TiCrN)後，導電性、耐腐蝕性、耐沖蝕性均可獲得改善，然而SUS 430僅披覆膜層(TiN、CrN、TiCrN)時，其耐腐蝕性、耐沖蝕性則較優異，其中又以-200V條件所披覆TiCrN多層膜的表現最佳。

關鍵字

耐腐蝕性；陰極電弧沉積；電鍍銅；肥粒體不銹鋼；燃料電池；耐沖蝕性；導電性

並列摘要

It is well known that SUS430 stainless steel is widely used in building materials, kitchenware, and household applications, and also that SUS430 stainless steel has been applied in bipolar plates of fuel cell in recent years. For the use of bipolar plates, it is very important to present the more electrical conductivity and corrosion resistance for extending the service life via some methods of the surface modification. In this study, thus, SUS430 stainless steel was used as the substrates, and two types of coating methods, copper plating and cathodic arc deposition (CAD) with the different biases to coat TiCrN film, were adopted to treat SUS430 substrates. The experimental results showed that the use of -200V bias condition to coat CAD-TiCrN film could improve the corrosion resistance of SUS430 stainless steel. In particular, CAD-TiCrN film with copper as interlayer has an evident increase in conductivity as compared to that of without the copper interlayer.

並列關鍵字

Corrosion resistance ； Cathodic arc deposition ； Electroplated copper ； Ferritic stainless steel ； Fuel cells ； Erosion resistance ； Electic conductivity

參考文獻

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SUS430不銹鋼電鍍銅及電弧披覆TiCrN薄膜之表面特性研究

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