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| The Study of Inhibitive Corrosion Mechanism of Ce-ion and La-ion for Carbon Steel In NaCl Solution |
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| 钢铁研究总院 |
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Abstract The effect of Ce-ion and La-ion inhibiting the corrosion of steel in NaCl solution has been investigated by salt water droplet test, corrosion production micro-analysis and electrochemistry test. The potential-pH diagram of RE-H2O was also used to investigate the chemical stability of various kinds of RE compound. The results showed that oxide and hydrate of RE deposited in the cathodal area where the pH value was relatively high and inhibited the corrosion of steel by blocking the transmission of O2 and electron between the cathodal area and solution. The potential-pH diagram and thermodynamics calculation showed the compound of Ce was more stable than compound of la in theacid solution and suggested that the ability of inhibition corrosion of Ce-ion is better than that of la-ion.
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Received: 27 October 2005
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