A copper corrosion inhibitor composition for new energy electric drive lubricating oil and application thereof
By adding benzotriazole and thiadiazole derivatives as copper corrosion inhibitors to the lubricating oil for new energy electric drive, the problem of copper component corrosion in lubricating oil at high temperatures was solved, achieving a synergistic improvement in excellent copper corrosion inhibition effect and extreme pressure anti-wear performance.
CN122234854APending Publication Date: 2026-06-19CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2024-12-18
- Publication Date
- 2026-06-19
AI Technical Summary
Technical Problem
In the electric drive system of new energy vehicles, lubricating oil is prone to corrosion of copper-containing components under high temperature aging conditions, which affects their service life. Existing technologies are difficult to effectively inhibit copper corrosion.
Method used
Benztriazole and its derivatives and thiadiazole and its derivatives are used as copper corrosion inhibitors. By controlling their mass ratio, an inert barrier film that prevents catalytic corrosion is formed, thereby inhibiting the occurrence of copper corrosion.
Benefits of technology
It effectively reduces the copper content in oil, extends the service life of copper-containing components, and at the same time maintains the extreme pressure and anti-wear properties of the lubricating oil.
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Figure CN122234854A_ABST
Abstract
This invention relates to the field of lubricating oil technology, and more particularly to a copper corrosion inhibitor composition for new energy electric drive lubricating oil and its application. The copper corrosion inhibitor composition comprises, by weight percentage: 10wt%~90wt% of benzotriazole and its derivatives and 10wt%~90wt% of thiadiazole and its derivatives. The copper corrosion inhibitor composition of this invention can be directly added to new energy electric drive lubricating oils requiring copper corrosion inhibition, with the addition amount being 0.01%~0.03% by weight. The copper corrosion inhibitor composition of this invention exhibits excellent copper corrosion inhibition performance, effectively reducing the corrosion of copper-containing metals with a relatively small addition amount, while not negatively affecting other properties of the oil such as extreme pressure anti-wear.
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