There are tens of thousands of NTN bearing manufacturers in our country, and it belongs to the largest producer and exporter of bearings in the world. And some bearing manufacturers have used the sealed anti-rust oil for 2-3 months, or even a few days later, the bearings will corrode. I did not do enough rust prevention homework. The product floated at sea for a month. The water vapor on the sea surface accelerated the corrosion of the product. In addition, the freight forwarding company's transportation was poor and the outer packaging was damaged, resulting in tiny rust spots. Although the rust spots are small, the transportation fee, port detention fee, product inspection fee, and return fee caused by it are a big loss! In addition, there are many companies that have product inventories, and customers ship in small batches and multiple batches. Product regulations are in warehouses, which can also easily cause product rust. When the product is about to be shipped, it will be a lot of time and labor loss to remove the rust and rust again when the product is rusted! Therefore, the rust prevention of the bearing is not only the rust prevention during its use, but also the rust prevention during the production process and before storage.

Metals are often exposed to dust, moisture, acid mist and other atmospheric environments during processing, which will cause rust. After heat treatment, the residual salt is not cleaned, the acid cleaning and acid printing solution are not completely neutralized, and the demagnetization is not clean with grinding wheel powder and iron. Chips, hand sweat, etc. are extremely easy to cause bearing rust. Therefore, to ensure that the workpiece will not cause loss during the processing, effective anti-rust measures must be taken for the bearing parts that stay in the process.