模拟文物铸铁的阴极保护行为  

CATHODIC PROTECTION BEHAVIOR ON RUSTED CAST IRON SIMULATING IRON ARTIFACTS

作　　者：张艳成[1] 何积铨[1] 吴荫顺[1] 韩汝玢[1] 刘永生[2] 杜水生 

机构地区：[1]北京科技大学 [2]山西省考古研究所

出　　处：《腐蚀科学与防护技术》1997年第3期228-230,共3页Corrosion Science and Protection Technology

基　　金：山西省文物局;冶金部腐蚀-磨蚀与表面技术开放研究实验室资助

摘　　要：在模拟的文物铸铁上，研究已生成较厚锈层的带锈铸铁在３．５％ＮａＣｌ溶液中的阴极保护行为和较厚锈层对铸铁阴极保护的影响．结果表明，带锈铸铁阴极保护初期的保护电流密度大小受非稳态扩散步骤控制，使得保护初期在较长时间内需要很大的保护电流密度，直到趋于稳定后，它才接近于相同条件下裸铸铁所需的保护电流密度大小．For understanding the behavior of the aging iron artifacts under cathodic protection thick rust layers were prepored on the simulating iron casts and then the effect of the thick rust layers on the behavior of the cast iron under cathodic protection has been invistigated. The results showed that cathodic current density was controlled by the unsteady state diffusion step in the early period of CP, which made the required cathodic current density larger than that for the bare cast iron at the same conditions for a long time. And when tending to the steady state, it had the same level as that for the bare cast iron over a long time.

关 键 词：带锈铸铁 阴极保护 非稳态扩散 保护电流密度 

分 类 号：TG174.41[金属学及工艺—金属表面处理]