【摘要】 为改善Oddy测试法实验周期长,依靠目测判断腐蚀程度的状况研究建立了一种薄膜试片测试法,研发薄膜试片、设计成套测试容器与夹具、改变测试条件并结合数码采集腐蚀图像和对腐蚀图像数字化分析等简化藏展材料评估筛选实验操作、缩短测试时间和提高结果分级判别能力。另外,固相微萃取和气质联用仪(SPME-GC/MS)被用于表征藏展材料在挥发和降解过程中所释放的污染物成分,佐证其对银、铜和铅金属文物的潜在危害。新建薄膜试片测试法表明,14d的测试周期不仅大大缩短了测试时间,简化了操作,而且薄膜试片的使用也有利于克服人为分级的主观判断性,为数字化分级打下坚实基础。更多还原

【Abstract】 Oddy test is an accelerated corrosion test used to evaluate the suitability of materials for use in display and storage cases in museums.The Oddy test requires three individual set - ups to study the corrosion effects of a given sample on three metals commonly involved:silver,copper and lead.The test samples and the coupon were placed in individual air - tight,constant humidity test tubes,which were kept at 60℃for 28 days.The effect of the test sample on the related metal objects was estimated by checking the corrosion of the coupon.A variant method is described here which simplifies the procedure and reduces test period by using film coupons instead of massive coupons, placing all three metal coupons into an improved test vessel,collecting digital corrosion images and analyzing them.SPME - GC/MS is simultaneously employed to identify the composition and concentration of the volatile substances emitted from the display and storage cases used in museum.The newly developed method decreased the test period to 14 days,simplified procedures,provided objective evaluation of corrosion based on digital data.更多还原