In practical applications, it is often encountered that the use of anti-rust grease can not achieve the expected anti-rust effect, and even accelerate metal corrosion. The reason can be checked from the following aspects.
1) Variety of anti-rust grease
There are many varieties of anti-rust grease, and the characteristics of various oil products are also different. Some have better replacement properties, some have better resistance to humidity and heat, some have better resistance to salt spray, some have better resistance to high temperatures and atmospheric resistance, and so on. Different types of oil have different uses. There are short-term rust prevention, lubrication rust prevention and long-term storage rust prevention between processes. The additives used in oil products are different to adapt to different metals, some have a significant effect on ferrous metals, and some have adaptability to non-ferrous metals and various metals. Therefore, not any kind of anti-rust oil products can adapt to different conditions. It is necessary to select the appropriate anti-rust oil products through practical tests according to specific conditions.
The quality of the anti-rust effect is also related to the quality of the anti-rust grease. An acceptance system should be established to check the incoming anti-rust grease to prevent unqualified products from entering the factory. In the course of use, prevent the oil film of the anti-rust grease from cracking or losing and affecting its anti-rust performance.
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2) Implementation of anti-rust process
The effect of anti-rust materials in production and use is related to various factors such as the use process and packaging materials. The anti-rust technology occupies a very important position in the anti-rust quality. The anti-rust technology should be formulated in accordance with the actual situation of the unit. Responsible, so as to avoid corrosion caused by process problems. In the course of use, it is often found that the same batch of qualified anti-rust grease will get different anti-rust effects. This situation should be checked from the anti-rust process, if a little negligence, it will cause an accident. The anti-rust process can be checked from the following points:
Cleaning: As the cleaning is not clean, there is moisture, hand sweat or salt on the metal surface, and the anti-rust oil used lacks sufficient replacement, so there is a hidden danger of corrosion. Some use solvent gasoline as the cleaning material, no replacement anti-rust oil is added to the solvent gasoline, and it is in a high-humidity climate when cleaning, and condensation will occur on the metal surface, even before the anti-rust oil is applied. It has been corroded. If you apply oil directly without treatment, it will inevitably lead to corrosion of the product. There are also rust prevention in time after cleaning, which will cause the product to rust before being oiled.
Inspection before the oil seal: metal parts should be inspected before the oil seal, must be clean and dry, no rust. If the rust has been removed, the rust must be removed, otherwise the rust will continue to exist and even develop. After derusting, the oil seal is made according to the anti-rust process to ensure the quality of the oil seal.
Heating: Some anti-rust greases are thick and cannot be dipped or brushed at room temperature. They need to be heated and melted before use. If it is not heated according to the specified temperature or operated at a high temperature for a long time, some additives will be decomposed into harmful corrosives. This rust-proof oil not only loses its rust resistance, but also becomes a corrosion accelerator. Therefore, when heating, the temperature must be controlled according to the regulations, and the high temperature or overtemperature cannot be kept for a long time. When not in use, the heating should be stopped to prevent the anti-rust grease from deteriorating, thereby ensuring the anti-rust effect.
Coating method: When coating anti-rust grease, the grease must be thin and uniform. If the oil film is too thick or the coating is uneven, it will cause the rust resistance of the thin film of the metal surface to be good, and the uneven thickness of the oil layer will cause uneven corrosion of the battery caused by corrosion. When dip coating anti-rust grease, because there is a large amount of oil before the oil is drained, it will be packaged, causing corrosion in places where there is a lot of oil; if a trace of rust is found, it is mainly caused by uneven or missing brush during painting ; When spraying, it will also cause uneven oil film or leakage spray. Therefore, when applying anti-rust grease, the oil film must be thin and uniform, and can not be missed to prevent corrosion. The metal parts that heat the oil seal must be cooled to room temperature before packaging, otherwise it is also prone to corrosion.Click here for more information about NSK 6206ZZ,we have enough stock.
3) Anti-rust packaging materials
If the quality of the packaging material is not good, the wrong choice or improper use will also make the rust prevention invalid. If the packaging material does not meet the quality requirements and the sealing is poor, the purpose of sealing and sealing cannot be achieved. For example, gas phase corrosion inhibitors are very selective for metals. When using gas phase paper, they must be selected according to the metal, otherwise it will promote metal corrosion. In addition, when using anti-rust paper, the rough surface is not in contact with the metal surface, so it cannot be used. To the expected effect; some plastic containers can also evaporate corrosive gases, which must be used with caution; the wood species used in the packaging wooden box, the degree of wet and dry, and the paint used have a certain impact on metal parts, and even Very serious impact. Therefore, when using packaging materials, it is necessary to select appropriate packaging materials in accordance with the specific circumstances to prevent product corrosion caused by the selection or use of packaging materials.
4) Storage environment
The quality of storage conditions is closely related to the corrosion rate of metals. Using the same anti-rust grease and the same oil seal anti-rust process, due to different storage conditions, the resulting anti-rust effect is very different. If the storage conditions are good, the rust prevention period will be long and the rust prevention effect will be good. On the contrary, the rust prevention period is short, and the rust prevention effect is also poor.
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