通过变压器油添加苯三唑型T551金属减活剂的腐蚀性硫试验和减活剂添加量试验,确定了T551具有抑制铜腐蚀和油品老化的作用.油质影响试验结果表明,T551能够将介质损耗因素从0.21％降低至0.08％,体积电阻率从5.97×1012Ω·cm提高至7.05×1012Ω·cm.采用飞行时间二次离子质谱对铜片表面进行分析,证实T551与铜发生螯合作用,苯三唑环上与氮原子相连的支链发生断裂,在铜表面形成苯三唑-铜的配位化合物.%The corrosion inhibition function of benzotriazole (BTA) type metal passivator T551 in transformer oil was investigated based on corrosive sulfur test (ASTM D1275B),the related properties of transformer oil were tested and the copper strip samples were analyzed by SEM and TOF-SIMS. Test results showed that T551 metal passivator exhibited good inhibition function of copper corrosion and aging of transformer oil. Adding T551 metal passivator in transformer oil,the dielectric loss of transformer oil could be reduced from 0. 21% to 0. 08% and the volume resistivity improved from 5. 97×1012Ω · cm to 7. 05×1012Ω · cm. The test results of copper strip surface indicated that chelation happened between T551 passivator and copper,the branch chain was broken from the nitrogen atom of BTA ring to form coordination compounds containing BTA and Cu on the copper surface.
展开▼
