Knowledge of anti-rust oil

The role of the rust inhibitor is to form a firm adsorption film on the metal surface to inhibit the contact of oxygen and water, especially water, on the metal surface, so that the metal will not rust. Lubricants are mainly used in industrial lubricating oil, metal processing cooling lubricating fluid, metal protective oil, etc. As an additive rust inhibitor, it must have sufficient adsorption to metals and solubility in oil, so rust inhibitors are composed of strong polar groups and appropriate lipophilic groups.
At present, the widely used and effective ones are as follows: sulfonates (calcium sulfonate, sodium sulfonate and barium sulfonate), carboxylic acids and their salts (dodecenylsuccinic acid, zinc naphthenate) , N-oleoyl sarcosine octadecylamine salt), organic phosphates, imidazoline salts, ester type rust inhibitors (lanolin and lanolin soap, spar-60 or 80, oxidized petroleum oil), heterocyclic Compounds (benzotriazoles), organic amines, etc. The main water-soluble rust inhibitors are: sodium nitrite, potassium dichromate, trisodium phosphate, diammonium hydrogen phosphate, sodium benzoate, triethanolamine, etc.
1. The role of anti-rust oil
1. It has a certain viscosity or scale, and forms a hard or soft continuous film attached to the metal surface, which isolates it from air and water and prevents rusting of steel or non-ferrous metals.
2. All kinds of anti-rust oils are short-term anti-rust properties, and the anti-rust period can last for about five years. However, if the machine is reused, the anti-rust film can be washed off with kerosene or stain removal oil at any time. This is different from Anti-rust paint for permanent anti-rust.
Second, the characteristics of anti-rust oil should have
1. The polar components in the oil film or anti-rust oil are easy to adhere to the metal surface.
2. It should be able to prevent main rust under specified conditions.
3. The anti-rust oil film should be easy to remove with solvent.