添加剂对变压器油腐蚀性和油色谱测定结果的影响

摘要

In order to study the corrosive properties of transformer oil after dibenzyl disulfide (DBDS) antioxidants are added and the corrosion inhibiting abilities of metal deactivators,a series of thermal aging tests are carried out on Oil Samples A and B in the laboratory.First,the thermal aging test is conducted to test the corrosive sulfur compounds by ASTM D1275B method.Then the thermal aging tests are carried out on Oil Sample A after adding a certain amount of metal deactivator (Irgament 39) at 130 ℃ to analyze the change of the dissolved gas contents in the oil.The study concludes that DBDS is one of corrosive sulfur compounds,while the metal deactivation is not.Metal deactivation can effectively prevent the occurrence of sulfur corrosion.However,it also consumes itself rapidly with the thermal aging.The contents of dissolved gases in the oil,such as H2,CO and CO2,increase significantly as a result of adding metal deactivator in the oil.which needs more attention regarding their impacts on oil chromatographic results,It becomes particularly critical in the diagnosis of transformer faults to avoid misjudgment.%为研究变压器油中添加抗氧化剂二苄基二硫醚(DBDS)后的腐蚀特性,以及金属减活剂抑制腐蚀的特性,在实验室以2种油(简称油A和油B)为主要研究对象,进行了相关加速热老化试验 首先根据ASTMD1275B法进行相关加速热老化试验,检测腐蚀性硫化物;然后对添加一定量金属减活剂(lrgament 39)的油B进行90℃下的加速热老化试验,分析油中溶解气体含量变化.研究发现:DBDS为腐蚀性硫化物,而金属减活剂不是;金属减活剂能有效防止硫腐蚀的发生,但其本身随热老化快速消耗;添加金属减活剂之后,油中溶解气体H2、CO、CO2等含量明显增加,需关注这些溶解气体的分析结果及其对油色谱测定结果的影响,特别是对变压器故障进行判断时,需考虑这一因素,以防误判.