化工技术与开发
化工技術與開髮
화공기술여개발
TECHNOLOGY & DVELOPMENT OF CHEMICAL INDUSTRY
2014年
1期
16-19
,共4页
模拟古代铸铁%碱液%氯离子%电化学行为
模擬古代鑄鐵%堿液%氯離子%電化學行為
모의고대주철%감액%록리자%전화학행위
analog ancient cast iron%alkaline%electrochemical behavior%potentiodynamic polarization curves
通过动电位极化曲线法，在几种含不同氯离子浓度的典型碱性水溶液中研究了模拟古代灰口铸铁、白口铸铁的电化学行为。结果表明，在不同碱性溶液中同种铸铁试样对氯离子浓度的钝化/活化敏感性不同；不同材质的铸铁试样在相同溶液中对氯离子的敏感性也不相同。并且，对于同种溶质的碱性溶液，铸铁对氯离子的敏感性则随着溶液的pH值增加而降低。这一结果将为铁质文物脱盐除氯的终点判定提供重要的依据。
通過動電位極化麯線法，在幾種含不同氯離子濃度的典型堿性水溶液中研究瞭模擬古代灰口鑄鐵、白口鑄鐵的電化學行為。結果錶明，在不同堿性溶液中同種鑄鐵試樣對氯離子濃度的鈍化/活化敏感性不同；不同材質的鑄鐵試樣在相同溶液中對氯離子的敏感性也不相同。併且，對于同種溶質的堿性溶液，鑄鐵對氯離子的敏感性則隨著溶液的pH值增加而降低。這一結果將為鐵質文物脫鹽除氯的終點判定提供重要的依據。
통과동전위겁화곡선법，재궤충함불동록리자농도적전형감성수용액중연구료모의고대회구주철、백구주철적전화학행위。결과표명，재불동감성용액중동충주철시양대록리자농도적둔화/활화민감성불동；불동재질적주철시양재상동용액중대록리자적민감성야불상동。병차，대우동충용질적감성용액，주철대록리자적민감성칙수착용액적pH치증가이강저。저일결과장위철질문물탈염제록적종점판정제공중요적의거。
Analog ancient cast iron in alkaline were probable to be passivated, but the presence of chloride ions in the alkaline solution made the analog ancient cast iron inclined to be activated. In this study, by virtue of dechlorinating reagents commonly used in electrochemical dechlorination of iron relics, we studied the electrochemical behavior of ancient white cast iron and gray cast iron in alkaline solutions, and obtained their potentiodynamic polarization curves. By comparison, we found that the same type of cast samples had different sensitivities to chlorine ions in different alkaline solutions;the cast samples of different materials in the same solution also had different sensitivities to chloride ions;in the same alkaline solution, the sensitivity of the cast iron to chloride ions decreased as the pH increases.
