本研究主要在探討當固溶處理（480℃，3小時）、人工時效處理時間（150℃，1、3、10小時）及腐蝕磨耗環境（空氣、蒸餾水及3.5wt%鹽水）等實驗條件不同時，對於A390鋁合金鑄件腐蝕磨耗行為的影響。此外，在鹽水、醋酸、鹽酸、硫酸、氫氧化鈉和氨水溶液等腐蝕環境下，進行浸泡實驗與動態電位極化測試，來探討熱處理方式與腐蝕環境對A390鋁合金腐蝕特性的影響。
實驗結果顯示，A390鋁合金在各種腐蝕溶液中的腐蝕型態皆為孔蝕，且除醋酸溶液外，在其他五種腐蝕溶液中，經浸泡一個月後，試片表面皆失去金屬光澤。
人工時效處理時間的增長，雖可改善A390鋁合金的耐磨耗性，但在時效處理過程中所產生的析出物，會破壞材料表面氧化膜的完整性，導致耐腐蝕性變差。
固溶時效處理試片在蒸餾水及3.5wt%鹽水中，表現出最佳的耐腐蝕磨耗性，在腐蝕磨耗面上，皆可發現犁溝及塑性變形等現象。整體而言，A390鋁合金在蒸餾水中的耐腐蝕磨耗性比在3.5wt%鹽水為佳，且會隨時效時間的增長而降低。

The primary purpose of this research was to investigate the effects of as-solution treatment (480℃, 3 hours), artificial aging (150℃, 1、3、10 hours) and the environment of corrosion wear (distilled water、3.5wt% NaCl solution) on the corrosion wear behavior of A390 aluminum alloy. In addition, immersion tests and potentiodynamic polarization tests were proceeded in the NaCl、CH3COOH、HCl、H2SO4、NaOH and NH3 solution to investigate the effects of heat treatments and the environments of corrosion on the corrosion behavior.
The results show that the corrosion pattern in every solution is pitting, and except in the CH3COOH solution, the luster of A390 aluminum alloy was lost after being immersed one month.
The wear resistance of A390 aluminum alloy was better when the holding time of artificial aging increased. However, the precipitates formed during aging treatment will cause damage to the completeness of the oxide and lower the wear resistance of the material.
In distilled water and 3.5wt%NaCl solution, as-solutionized Al alloy exhibited the best corrosion wear resistance. Plastic deformation and plough were observed on the worn surface of A390 aluminum alloy. In conclusion, the corrosion wear resistance of A390 aluminum alloy in the distilled water was better than that in the 3.5wt%NaCl solution. However, the corrosion wear resistance was decreased with the increase of the holding time of artificial aging.

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