Metal cleaner formulations

Metal cleaners are widely used in industrial production and are often used for surface degreasing and descaling before and after metal processing, as well as cleaning processes before assembly or packaging of finished products. In the electronics industry, cleaning agents must also be used to remove harmful residues after soldering of printed circuit boards. In addition, metal cleaning agents are often used during the maintenance of machinery and equipment.

Currently, commonly used metal cleaners include solvent-based, semi-solvent-based, and water-based. In solvent-based metal cleaners, petroleum solvents are flammable, explosive, and a waste of resources. Chlorofluorocarbons (CFCs) are the most commonly used solvent-based metal cleaners, although they are banned due to their damaging effect on the atmospheric ozone layer. As a result, solvent-based metal cleaners are gradually being replaced by semi-solvent and water-based metal cleaners. As the replacement date of hydrochlorofluorocarbons (CFCs) approaches, the research and application of water-based cleaning agents have attracted attention from all parties.

Composition analysis of raw materials for water-based cleaning agents In general, the dirt adsorbed on the metal surface consists of water-soluble and non-water-soluble soils. The former covers sugars, starches, organic acids and bases, blood, proteins, and inorganic salts, while the latter includes animal and vegetable oils, fatty alcohols, mineral oils, dust, soil, metal oxides, etc.

Water-based cleaning agents use surfactants as the main ingredient, and various additives are added, such as additives, stabilizers, corrosion inhibitors, solubilizers, defoamers, antifungal agents, antifreeze, etc. The function of surfactant is to significantly reduce the surface tension of the liquid and reduce the adhesion of the oil. Through mechanical force such as stirring and ultrasonic, as well as heating and heat, the potential energy of dirt separation is increased, and the effect of wetting and penetration is improved. Various additives have the functions of dissolving grease, softening hard water and preventing re-deposition, etc., which can emulsify, disperse and suspend the dirt in the washing solution, thereby enhancing the cleaning effect of surfactants.

Recipe example 01 Phosphate-free water-based metal cleaner agent The mass fraction of each raw material component is: AESA (C12 fatty alcohol polyoxyethylene ether ammonium sulfate): BJH-1 (aliphatic amines, homemade): OP-10 (octylphenol ethoxylate): M550 (dimethyldipropylammonium halide propionylammonium copolymer) = 6:4:4:1 (molar ratio), and Na-CP4 (sodium salt of maleic anhydride and acrylic acid copolymer) and sodium silicate are added as detergents according to the mass ratio of 95:5, The washing effect and anti-rust performance of the 5% dilution were evaluated. The results showed that the cleaning agent has strong detergency and good rust prevention performance, does not contain phosphide, and is environmentally friendly.

02 The mass fraction of each raw material component of water-based cleaning agent for metal bearings is: fatty alcohol ethoxylate, 2% - 8%; alkylphenol ethoxylates 2% - 8%; fatty acid alkanolamide 3% - 10%; triethanolamine oleate 5% - 25%; triethanolamine 10% - 22%; monoethanolamine 5% - 18%; sodium alkyl sulfonate 0.5% - 3%; benzotriazole 0.01% - 0.5%; disodium ethylenediaminetetraacetic acid 1% - 2%; Water 3.5% - 71.49%.

03 A metal cleaner  agent This metal surface cleaning agent is formulated from the following raw materials, and the mass fraction of each raw material component is: sodium silicate (35% - 45%), sodium tripolyphosphate (50% - 55%), fatty alcohol ethoxyethylene ether (5% - 10%); The production method is to put the above components into a stirrer in proportion for stirring and mixing, and after stirring and mixing evenly, it can be packaged to obtain. When using, dissolve this product with water at a ratio of 1:10 to clean metal.

04 Low foaming water-based metal cleaner  agent The mass fraction of each raw material component is: 0.5% 6501, 0.5% triethanolamine oleic acid soap, 0.25% GT - 12, 0.25% S - 86, 1.25% M - 10, 0.75% polyether L61, 10% triethanolamine, 1% Na2CO3, 1% borax, 5% disodium EDTA, 0.3% silicone.

05 Environmentally friendly industrial water metal cleaner  agent The mass fraction of each raw material component is: 10% of fatty alcohol polyoxylate, 6% diethanolamide laurate, 7% starch glycoside surfactant, 2.2% of polyoxyethylene ether sulfate, 1.8% sodium salt of disecyl sulfonate succinate, 1% sodium benzoate, 0.1% of sodium benzoate, 0.1% of sodium sodium benzoate, 1% of sodium benzoate, 1% of urea, and a certain amount of deionized water is added to a 100 mL beaker with high-speed stirring. Control the temperature at about 55 °C, add fatty alcohol ethoxylates in turn, add starch glycoside surfactant after it is completely dissolved, continue to stir, after 30 min, then add diethanolamide laurate, polyoxyethylene ether sulfate and urea (the temperature and polyoxyethylene ether sulfate concentration should be accurately controlled during preparation to prevent the formation of polyoxyethylene ether sulfate gel), continue to stir for 30 - 45 min, cool down to about 40 °C, add sodium salt of disecyl sulfonate succinate, preservatives and other additives, Continue stirring for a few minutes and let cool to room temperature.

These formulation examples demonstrate the versatility of water-based cleaners. From the good decontamination and anti-rust performance of non-phosphorus water-based metal cleaner agent and environmental protection, to the combination of a variety of raw materials in specific proportions of metal bearing water-based cleaning agent, to the simple production and use of metal cleaner agent made of sodium silicate, sodium tripolyphosphate and fatty alcohol ethoxyethylene ether, as well as the ratio of various raw materials of low-foaming water-based metal cleaner agent, as well as the environmentally friendly industrial water metal cleaner agent using a variety of surfactant compounding and strict control of temperature, concentration and other production processes. While meeting the needs of metal cleaner , they are also constantly developing in the direction of environmental protection and high efficiency, and different raw material combinations and production processes are suitable for different industrial cleaning scenarios.