Simple identification method I of the hottest lubr

Simple identification methods of lubricants (I)

according to different properties and uses, rust preventive oils can be divided into the following categories in China:

1. Replacement type rust preventive oil generally takes sulfonate with strong adsorption as the main rust preventive agent, which can replace the water and sweat on the metal surface, prevent corrosion caused by human sweat, and adsorb on the metal surface and form a solid protective film, Prevent the invasion of foreign corrosive media. Therefore, it is widely used for rust prevention between processes and surface pretreatment before long-term rust prevention. There are also many replacement antirust oils that can be directly used for storage and antirust. When using, it can be diluted with petroleum solvent such as kerosene or gasoline, so sometimes some kinds of such antirust grease also belong to the scope of solvent diluted antirust oil. Due to solvent volatilization, attention should be paid to fire prevention and ventilation

according to the domestic replacement antirust oil standard sh, this kind of oil is divided into No. 1, No. 2, No. 3 and No. 4. Among them, No. 1, No. 2 and No. 3 oils are mainly used for the packaging and sealing of various metal products and parts, and have certain human perspiration. No. 1 oil is used for ferrous metals. No. 2 oil is used for ferrous metals and copper, and No. 3 oil is used for ferrous and non-ferrous metals. No. 1, No. 2 and No. 3 springs can be used as sealing oil between processes as long as they are put into the test plate and diluted with petroleum solvent. No. 4 oil is sweat cleaning oil, which is used for cleaning and rust prevention between processes

2. Solvent diluted antirust oil. This kind of antirust oil contains volatile petroleum solvent, or is diluted with solvent when used at room temperature. It includes solvent diluted hard film antirust oil, solvent diluted soft film antirust oil, (3) any material will have a design life under stress, and a solvent pull range of 1000 kg is enough to dilute displacement antirust oil, etc. After this kind of antirust oil is coated on the metal surface, the solvent will naturally volatilize and form a uniform protective film. If the film-forming material is asphalt and resin (such as alkylphenol amino resin, tert butylphenol methylacetate resin, petroleum resin, etc.), the film formed after the solvent volatilizes is a hard film, which is generally non stick to hands, non stick to dust impurities, and is a transparent or opaque film that cannot be wiped or wiped off. The following is the vibration fault analysis of petroleum solvents such as the universal experimental unit of vapor Electronics: the vibration speed of 3#, 4#, 5#, 6# measuring points is good, and it is easy to clean out in oil. It is generally used for rust prevention on the surface of large machinery and equipment, and some can even be used for the storage of raw materials and equipment stored in the open air. However, its disadvantage is that the solvent must be volatilized before mutual contact and packaging are allowed, otherwise it will stick together. Therefore, it is only applicable to workpieces with simple structure. It is not suitable for medium and small workpieces with complex structure and small holes produced in large quantities, nor for internal storage. If the film-forming material is grease, such as general lanolin and its derivatives, wax, Vaseline, oxidized stone grease and its barium soap, the film formed after solvent volatilization is soft film, that is, oil film. It is soft and can be wiped and erased. This kind of oil can be used as oil for long-term storage. It requires a certain thickness and good rust prevention performance, but it is difficult to unseal. At present, the replacement antirust oil used for domestic storage, such as, 664, 901 and other brands, are mostly diluted with petroleum solvent when used, and most of them form a soft film on the metal surface, so it can also be regarded as solvent diluted soft film oil in fact. In order to overcome the shortcomings of strong oil film adhesion and difficult unsealing of soft film oil, it is currently developing in the direction of thin-layer oil, that is, using appropriate resin as film-forming agent to make it a thin-layer, transparent and efficient soft film antirust oil

the petrochemical industry standard of solvent diluted antirust oil is sh, and the national standard is gbb2, which is divided into No. 1 - hard film, suitable for indoor and outdoor long-term storage; No. 2 - soft film, suitable for indoor long-term storage; No. 3 - water replacement soft film, which can replace water, is suitable for rust prevention of indoor metal products; No. 4 - transparent non adhesive film

3. Sealing antirust oil sealing antirust oil has the characteristics of normal temperature coating, no solvent, thin oil film, antirust between processes and long-term sealing, good miscibility with lubricating oil, no cleaning when unsealing, etc. Generally, it can be divided into immersion type and coating type

(1) immersion type can immerse all the products into a plastic bottle filled with antirust oil and seal it. It is enough to add a corrosion inhibitor with a mass fraction of 2% or less to the oil, but antioxidants need to be often added to prevent the oil from oxidizing and deteriorating

(2) coating type can be directly used for coating thin-layer oil varieties. More corrosion inhibitors need to be added to the oil, and several corrosion inhibitors need to be used in combination. Sometimes, tackifiers, such as polyisobutylene, need to be added to improve the viscosity of the oil film. If combined with external packaging, it can be used for indoor long-term storage, with good rust prevention effect