A qualified cutting fluid should have a certain anti-rust performance. Anti-rust cutting fluid generally means that the anti-rust performance is very good, even exceeding the national standard requirement of 4h.
So what is the rust resistance of the cutting fluid determined by those factors? Generally, the influence of the anti-rust performance of the cutting fluid is comprehensive, and they are closely related to each other and are indispensable.
1. The performance of the rust inhibitor in the cutting fluid, that is, the quality of the rust inhibitor added in the cutting fluid. It is especially important that high quality rust inhibitors can provide good rust protection.
2. The amount of rust inhibitor added in the cutting fluid, with sufficient amount of rust inhibitor to ensure that the cutting fluid is diluted to meet the target rust prevention needs.
3, synergistic rust prevention. The value is that a certain amount of secondary rust protection is provided by the other component additives in the cutting fluid.
4, Surfactant boosting effect, no matter how good the rust inhibitor can not react with the clean metal surface evenly;
5, the appropriate pH, alkaline environment is conducive to slow the movement of metal and electrons, usually ph is better than 9, but considering the corrosion of the cutting fluid acid and alkali, operator adaptability, etc., the cutting fluid ph value is usually Positioned between 7.5 and 9.5.
6. The amount of calcium and magnesium ions in the water, because the rust inhibitor in the cutting fluid easily reacts with calcium and magnesium ions in the water to form water-insoluble matter.
7. The workpiece storage environment, the influence of the humidity and temperature of the air in the storage environment on the anti-rust time of the workpiece is also very important.