ASTM腐蝕速率量測方法於高溫腐蝕之應用

The Measurement of the ASTM Corrosion Rate for the Application of High Temperature Corrosion

選用低碳鋼，依ASTM G54規定，於800℃分別進行2、4和8小時單純靜態氧化試驗。藉由系統化實驗程序，以金相檢驗法為參考標準，探討ASTM G1規定之機械、電解和化學清洗等三種去除氧化皮膜方法，於腐蝕速率評估之正確性。其結果顯示，以化學清洗法最準確，電解法次之，而機械法效果最差。

To investigate the accuracy of the calculation of corrosion rate for high-temperature oxidation, three cleaning methods of ASTM G1 were evaluated. Based on ASTM G54, low carbon steel was statically oxidized at 800℃, for 2, 4 and 8 hrs, respectively. The corrosion rates were calculated by weight changes per unit area obtained by mechanical cleaning, by electrolytic cleaning and by chemical cleaning. The error percentage ratios were compared with the standard reference obtained by OM examination. The results show that descaling by chemical cleaning has the best accuracy, while mechanical cleaning produces the worst results.