염화물 수용액에서 자작나무 수액을 이용한 철강의 부식 억제
Corrosion Inhibition of Steel by Addition of Birch Sap in Chloride Solution
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The effects of birch sap, a possible natural corrosion inhibitor, on the corrosion behavior of steelin chloride solution were investigated. The corrosion rate was significantly reduced by the additionof 1~5 mL of birch sap to 500 mL of 3wt% NaCl or 3wt% CaCl2 solution. A remarkable increasein the pitting potential in NaCl solution was observed by the addition of birch sap although it wasalmost constant in CaCl2 solution. The corrosion rate of steel in both NaCl and CaCl2 birch sap solutionwithout addition of water was higher compared to that of aqueous solution without birch sap as thepH of the birch sap was 4.0. The presence of organic compounds like, fructose, galactose, glucose,and palmitic acid in the birch sap are thought to be adsorbed effectively on the metal surface, whichprovided corrosion protection. However, the inorganic elements including Na, Ca, K, Mg, Mn, S, etc. present in the birch sap exhibited no role in corrosion inhibition.
Abstract
The effects of birch sap, a possible natural corrosion inhibitor, on the corrosion behavior of steelin chloride solution were investigated. The corrosion rate was significantly reduced by the additionof 1~5 mL of birch sap to 500 mL of 3wt% NaCl or 3wt% CaCl2 solution. A remarkable increasein the pitting potential in NaCl solution was observed by the addition of birch sap although it wasalmost constant in CaCl2 solution. The corrosion rate of steel in both NaCl and CaCl2 birch sap solutionwithout addition of water was higher compared to that of aqueous solution without birch sap as thepH of the birch sap was 4.0. The presence of organic compounds like, fructose, galactose, glucose,and palmitic acid in the birch sap are thought to be adsorbed effectively on the metal surface, whichprovided corrosion protection. However, the inorganic elements including Na, Ca, K, Mg, Mn, S, etc. present in the birch sap exhibited no role in corrosion inhibition.
참고문헌 (19)
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