Antirust grease is an oil composed of oils and minerals, that has been added with different oil-solublecorrosion inhibitors and additives. It contains an oil-soluble, base oil, as well as other additives. This article will describe the principal chemical additives that are found in rust-preventive oils.
1. Preparation for antirust material–alluminium bis-stearate
You may also know aluminum stearate as brushed or glass butter. It can be white or hardened at room temp. According to how much aluminum salt is present, the amounts of aluminum monostearate stearate and aluminum tristearate were obtained in the manufacturing process. Aluminum bisstearate offers the greatest resistance to rust. A mixture of three aluminum salts, and a tiny amount of aluminum oleate soot makes up the industrial product aluminumstearate. Aluminum stearate exhibits excellent resistance against damp heat, salt spray and atmospheric resistance. While it can be used to antirust ferrous metals copper and aluminum, the water film and sweat displacement abilities, as well as saltwater impregnation capability, are very poor. It is used for making grease-type antirust oils, which are suitable to measure and prevent the rust of cutting and measuring tools.
2. Antirust oil also contains antioxidants
Free radical chain reaction occurs when rust preventive oils are stored and used. It is caused by the interaction of heat, light, metal and heat. When this happens, the oil will precipitate, gel or deteriorate. This makes it necessary to stop or slow down. Anti-rust oils oxidative degradion additive-antioxidant. Commonly used as antirust oils, phenols or amines.
1. 2,6-di-tert-butyl-p-cresol: it is an alkylation reaction of isobutylene and p-cresol under the catalysis of concentrated sulfuric acid, and then refined by neutralization. It acts as a termination of free radicals. T501 codenamed, or 264. It has a clear or yellowish color at room temperature.
2. Diphenylamine: A free radical terminator, it is produced by condensation of aniline under the anhydrous trichloride catalyst, followed with salting-out, neutralization distillation and crystallization. It has a grayish-black color at room temperature. It is easily soluble with mineral oil, ether and benzene as well carbon disulfide.
3. Butyl octyl thiophosphate consists of isooctyl alcohol, n.butanol phosphorus pentoxide & zinc oxide. As a diluent it uses 150 SN Neu oil. It is made by vacuum dewatering. T202, a peroxidation reducing agent with antiwear and anticorrosion characteristics is available. It can be used in lubricating and rust applications, as it has excellent resistance to higher temperatures. Oil is typically used at a rate of 0.5 %.
3. Antirust oil auxiliaries
To meet the different needs of antirust items, there are special additives that may be required. 1. Antirust oil or lubricated nonrust grease: When equipment runs, the surface of the liquid is shaken to remove any air. Defoamer molecules can rapidly enter the interface between the oil and the bubble. They destroy the mechanical balance of this liquid film. The foam is then destroyed or suppressed. One common defoamer that is used frequently is methyl silicon oil. 2. Extreme pressure additive: To use antirust oils equipment, metal surfaces that come in contact with each other occasionally generate high pressure. Additionally, friction heat can be generated, which damages the oil layer between the metals. Worn, or sintered. In these conditions, extreme pressure agents can form chemical reaction films with lower melting points and lower shear strengths. They are able to reduce friction and protect the metal surfaces from scratching and sintering. Some high molecular substances and compounds that contain boron are common examples of extreme pressure agent. 3. One class of chemicals called a cosolvent. They can make certain additives more soluble and maintain their stability in rust preventive oils. These cosolvents can be used to increase the solubility of certain additives, such as dibutyl Phthalate, dioctyl Phthalate, ethanol, or butanol.
4. In the zinc naphthenate antirust treatment, an antirust agents is commonly used
An antirust agent used widely in antirust products, zinc naphthenate (a by-product sodium naphthalate) is produced by the chemical wash process. It has a viscous, brownish brown liquid that is stable at room temperatures. Zinc inorganic naphthenate has an affinity for mineral oil, and a solubility reaction on certain potent potential polaritycorrosive inhibitors. The iron metal exhibits an anti-moisture quality. Although the ferrous metal can neutralize sweat and replace it with sweat, its antirust properties on copper, silver, and bronze are significant. But the anti-overlap property and salt spray resistance are weak. Combine with bismuthonaphthalene and petroleum sulfurate to increase antirust properties of cast iron. Zinc naphthenate improves the acidity in base oils. An acid level of 1% can be raised to 1.0-1.25 mgKOH/g. Also, the mineral oil’s oxidation rate is increased when the temperature is high. For short-term rust prevention, it can be used as a ferrous or non-ferrous metallic process oil. The oil contains a high amount of zinc hypochthenate to prevent prolonged heating and avoid oxidation.
5. Preparation and use of decyl-succinic acid as a rust preventive.
A common method of making antirust oils is dodecyl-succinic, which falls under the category of an alkenylsuccinic acid corrosion inhibitor. It’s a viscous brownish yellow or brownish red transparent liquid at room temperatures. It isn’t steam turbine oil. Dodecylsuccinic Acid is extremely soluble with mineral oil. Two carboxyl groups are found at the end of each molecule. Because they have two different ends, the acid can be strong enough to adhere to the surface quickly, and create an active layer protecting against rust. For rust prevention, the appropriate amount of dodecenylsuccinic Acid can be added to the turbine oils to get a satisfied antirust result. In the antirust oil, the level is approximately 1%. Dodecenylsuccinic has the characteristic of not emulsifying in water. Therefore, it can be used for dehydration and antirust oils as well oil oils that are required to prevent emulsification when using instrument oil lamps. Dodecyl-succinic is very resistant to the rust of black metal, copper, as well as aluminum. You should limit the dosage due to its acid value. You can use it in combination with dodecyl-succinic acid, strontium petrol sulfonate. Hydrazine dinonylnaphthalene.sulfonate.alkenylimidazoline.
6. Preparation and use of metal soaps for the preparation carboxylic acids.
These oils can be used in making rust prevention oil carboxylic Acid and its metal corrosion inhibitor. It can also be used for making oils that have high demulsibility using the turbine oil lamp. For storage and drying antirust oil, dilute succinic is most widely used. It can also be mixed with more sulfonatecorrosive agents. However, acid soap corrosion inhibitor is less effective than the corresponding acid. The oil does not absorb the inhibitor’s rust inhibiting properties. These soaps, dicarboxylic Acid and carboxylic Acid, are toopolar to be soluble with fats. This acid soap corrosion inhibitor can be used to store and prepare antirust oil.
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