酸性溶液中氟化物對鈦之腐蝕效應

The Effect of Fluoride on the Corrosion of Titanium in Acidic Solution

邱善得(San-Der Chyou) ； 洪輝能(Hui-Neng Hong) ； 洪瑛鍈(Ying-Ying Hong)

《防蝕工程》 8卷4期 (1994/12) Pp. 190-198

https://doi.org/10.6376/JCCE.199412.0190

並列摘要

Due to the excellent corrosion resistance in high chloride environment, recently titanium was considered as a candidate material for flue gas desulfurization (FGD) system. Although titanium was highly chemically resistant, it was reported that titanium oxide was still attacked by concentrated sulfuric acid, notably by fluoric acid. Therefore this study was aimed to explore the effect of fluoride on the corrosion of titanium in simulated FGD acidic chloride solution.
Corrosion tests employed the electrochemical methods including cyclic polarization and open circuit potential measurement. Electrochemical measurements were performed under controlling the solution temperature. The critical corrosion concentrations of fluoride at various temperatures were also determined. Using the X-ray Photoelectron Spectrum (XPS), the corrosion products were identified as TiO(superscript +2)•H2O, TiO2, and TiO•SO4 (or Ti(SO4)2). A corrosion mechanism was proposed according to this analysis.

並列關鍵字

corrosion ； titanium ； fluoride ； flue gas desulfurization(FGD) ； cyclic polarization ； X-ray photoelectron spectrum(XPS)