摘要
通过紫外光和荧光曝露加速腐蚀实验,采用L1645正交试验方案研究银器文物抗光照腐蚀的缓蚀处理的影响因素,对PMTA1-苯基-5-巯基四氮唑、MBO2-巯基苯并恶唑、MBI2-巯基苯并咪唑及其复合缓蚀剂的防银变色作用进行了比较和研究,筛选出复合缓蚀剂的最佳配比和缓蚀处理的工艺条件。结果表明,在酸性条件下,PMTA:MBO:MBI为2:1:3,总投加浓度3000mg·L-1,银试片经50℃,4h预膜处理,加速腐蚀试验后的增重和外观的变化较小,显示了复合缓蚀剂各组分之间存在较好的协同效应,能够满足银器文物抗变色处理的要求。
By means of UV and fluorescent light exposure accelerated corrosion test,the influence factors of corrosion inhibition on anti- tarnishment of silver antiques were studied with L16(45)orthogonal table in this paper. Tarnish inhibition of PMTA, MBO,MBI and the composite corrosion inhibitor of these azoles compounds for silver antiques was studied and assessed. The test results showed that good synergistic effect came into existence among corrosion inhibitors MBO, MBI and PMTA. The optimum process condition was screened:weight radio of PMTA:MBO:MBI was 2:1:3,total concentration of composite inhibitors colution was 0.0189 mol/L, pH3.0, treatment temperature was 50℃ and pretreatment time was 4h. Treated by this process,silver surface kept clean and bright without any spot after 36h, UV light exposure corrosion test,and its anti- tarnishing capability was improved obviously.
出处
《文物保护与考古科学》
2001年第2期1-7,共7页
Sciences of Conservation and Archaeology
关键词
银器文物
防变色
文物保护
缓蚀剂
唑系化合物
Silver, Anti- tarnishing,Antique conservation,Corrosion inhibitor, Azoles
