When diamond wire cutting metal workpieces, the anti-corrosion performance of diamond wire cutting fluid plays a vital role in ensuring the quality of workpieces and extending their service life.
First, the reasons why metal workpieces face corrosion risks during cutting. During cutting, the metal surface forms a complex electrochemical environment with diamond wire cutting fluid, air, and debris generated during cutting. Since the metal itself has different electrode potentials, it is easy to form micro-batteries in the presence of electrolytes (diamond wire cutting fluid) and electrochemical corrosion occurs. For example, during the cutting process of steel workpieces, iron as an anode loses electrons and is oxidized, and certain components in diamond wire cutting fluid may accelerate this process. At the same time, factors such as high temperature, high pressure environment and mechanical stress generated by cutting will destroy the original passivation film on the metal surface, making the metal more susceptible to corrosion.
Secondly, the guarantee mechanism of diamond wire cutting fluid's anti-corrosion performance. Adding appropriate rust inhibitors and corrosion inhibitors to diamond wire cutting fluid is the key. Rust inhibitors can form a dense protective film on the metal surface to isolate the metal from the external environment. For example, some organic rust inhibitors such as fatty acids and their derivatives can prevent the erosion of oxygen, moisture and other corrosive substances by physical adsorption or chemical adsorption on the metal surface. Corrosion inhibitors work by inhibiting the anodic reaction or cathodic reaction in the electrochemical corrosion process. Inorganic corrosion inhibitors such as sodium nitrite can form an oxide film on the metal surface, reduce the dissolution rate of the anode, and thus reduce the degree of corrosion. In addition, the pH of diamond wire cutting fluid also needs to be reasonably controlled and kept in an appropriate range to avoid excessive acid or alkaline environment to accelerate metal corrosion.
Furthermore, the specific performance and importance of metal workpiece protection. Good corrosion resistance can ensure that the surface finish of the metal workpiece is not damaged after cutting, there is no obvious corrosion mark, and the dimensional accuracy is guaranteed. For some metal parts with high precision requirements, such as parts in the aerospace field, even tiny corrosion pits may cause the performance of the parts to deteriorate or even fail. Moreover, protecting metal workpieces from corrosion can also extend their subsequent storage time and service life, reducing the waste of resources and cost increase caused by corrosion problems. For example, in the manufacture of electronic equipment, if the cutting process of metal circuit boards can effectively prevent corrosion, the reliability and stability of the circuit boards can be improved, and the product failure rate can be reduced.
Finally, in practical applications, it is necessary to comprehensively consider various factors to ensure the anti-corrosion performance of diamond wire cutting fluid and the protection effect of metal workpieces. It is necessary to select the appropriate diamond wire cutting fluid formula according to the material characteristics of different metal workpieces. For example, for different metals such as aluminum and aluminum alloys, copper and copper alloys, the corresponding types and amounts of anti-corrosion additives will be different. At the same time, attention should be paid to the use environment of diamond wire cutting fluid, such as the influence of temperature, humidity and other conditions on its anti-corrosion performance, and the composition and use parameters of diamond wire cutting fluid should be adjusted and optimized in time. In addition, the anti-corrosion performance of diamond wire cutting fluid should be tested and evaluated regularly to ensure that it is always in a state of effective protection of metal workpieces, providing reliable protection for diamond wire cutting processing.
