带锈青铜文物材料在环境模拟介质中的腐蚀发展行为

发布时间：2018-04-28 17:15

本文选题：带锈青铜 + 粉状锈　；参考：《表面技术》2017年02期

【摘要】：目的研究3种带锈青铜及裸青铜文物材料在3种环境模拟液中的腐蚀发展行为。方法采用动电位扫描和SEM-EDS等方法研究试样的腐蚀特征和现象。结果在模拟大气环境介质中,电位在50~160 m V阳极极化范围内,与其他三种青铜材料相比,带CuCl锈青铜的阳极腐蚀电流密度最小;在模拟海水介质中,锈蚀青铜的腐蚀电流密度略大于裸青铜的;在模拟SO_2环境介质中,4种青铜试样的Rp值均大于大气环境介质中的。结论在模拟大气环境介质中,且阳极极化电位接近自腐蚀电位时,CuCl锈对青铜基体具有一定的保护性;在模拟海水环境介质中,带锈青铜的表面锈对基体没有保护作用;在模拟SO_2环境介质中,与在模拟大气环境介质中相比,SO_3~(2-)的引入会抑制青铜的腐蚀。表面形貌和能谱分析结果表明,裸青铜、CuCl锈青铜和混合锈青铜在模拟SO_2环境介质中,有点蚀现象发生,对粉状锈的生成有抑制作用。
[Abstract]:Objective to study the corrosion behavior of three kinds of rusty bronze and bare bronze in three kinds of environmental simulation solution. Methods the corrosion characteristics and phenomena of samples were studied by potentiodynamic scanning and SEM-EDS. Results in the simulated atmospheric medium, the anode corrosion current density of the bronze with CuCl rust was the lowest in the range of 50 ~ 160mV anode polarization, and in the simulated seawater medium, the corrosion current density of the anode with CuCl rust bronze was the lowest. The corrosion current density of corroded bronze is slightly higher than that of bare bronze, and the RP value of four bronze samples in simulated SO_2 medium is higher than that in atmospheric medium. Conclusion when the anodic polarization potential is close to the self-corrosion potential, CUCL rust can protect the bronze matrix in simulated atmospheric medium, but the surface rust of rusted bronze has no protective effect on the matrix in the simulated seawater environment. In the simulated SO_2 environment medium, compared with the simulated atmospheric environment medium, the introduction of so _ S _ 3H _ (2) can inhibit the corrosion of bronze. The results of surface morphology and energy dispersive spectrum analysis show that the corrosion of bare bronze and mixed bronze in simulated SO_2 environment is a little, which can inhibit the formation of powdery rust.
【作者单位】：华东理工大学;上海博物馆;
【基金】：大学生创新创业训练计划项目(x14088) 上海市科委科研计划重点支撑项目(13231203000)~~
【分类号】：K876.41;TG174.3

【相似文献】