電鍍銅及電弧披覆CrAlSiN鍍膜對ADI耐蝕性之影響

Effect of Copper Plating and CrAlSiN Arc-coating on Corrosion Resistance of ADI

陳建勳(Jian-Xun Chen) ； 林俊穎(Chun-Yin Lin) ； 陳彥仁(Yan-Ren Chen) ； 許正勳(Cheng-Hsun Hsu)

《鑄造工程學刊》 47卷1期 (2021/03) Pp. 11-20

摘要

本研究採用沃斯回火延性鑄鐵ADI（Austempered ductile iron）為基材，先以電鍍銅當作中介層，再利用陰極電弧沉積（Cathodic arc deposition, CAD）方法於表面披覆CrAlSiN陶瓷硬膜，並且分別披覆單層電鍍銅及CAD-CrAlSiN膜層作為比較組，然後進行極化試驗、鹽霧試驗及浸泡試驗，以比較兩種表面處理對ADI微結構及耐候腐蝕性之影響。實驗結果顯示，ADI經過電鍍銅及CAD-CrAlSiN鍍膜並不會劣化ADI優異的微觀組織。以電鍍銅作為中介層可改善CAD-CrAlSiN鍍膜附著性。經過極化試驗、鹽霧試驗及浸泡試驗後發現單一電鍍銅及CAD-CrAlSiN鍍膜對ADI耐腐蝕性之影響不明顯，但結合兩種表面處理可明顯改善ADI耐鹽害腐蝕之效用。

關鍵字

沃斯回火延性鑄鐵 ； 電鍍銅 ； CrAlSiN鍍膜 ； 耐蝕性

並列摘要

This study has adopted austempered ductile iron (ADI) as the experimental material. Copper plating was first used as the interlayer, and then CrAlSiN ceramic hard film was coated on the outer-layer of ADI by the cathodic arc deposition (CAD) method. For a comparison, both the single-layer of copper plating and CAD-CrAlSiN film were prepared respectively. The corrosion tests containing polarization test, salt spray test, and immersion test were performed to evaluate the effects of the surface treatments on the microstructure and weather resistance of ADI. Experimental results showed that the microstructure of ADI had no deterioration after the copper plating and CAD-CrAlSiN coating treatments. It was found that the single layer of copper plating or CAD-CrAlSiN coating had no significant influenced on the corrosion resistance of ADI. However, using electroplated copper as an interlayer for CAD-CrAlSiN coating, it increased the adhesion between the substrate and CAD-CrAlSiN coating, and improved the performance of corrosion resistance to salt damage.

並列關鍵字

Austempered ductile iron ； Copper plating ； CrAlSiN coating ； Corrosion resistance

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