Functional adhesive - anti-corrosion glue, so that the product has a "King Kong is not bad" body!

Nature's corrosion of objects has become commonplace. Metal rust, bathroom mold, wood decay, aging wires, etc. can be seen everywhere. Corrosion is eroding the earth's resources, affecting the life of products, and on specific occasions threatening the safety of people's lives and

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anti-corrosion is one of the most difficult problems facing modern industry. Anti-corrosion process, anti-corrosion glue, anti-corrosion coating is the human intelligence to resist the phenomenon of corrosion of the three shields, which are targeted to be applied to specific parts of the product, so that the product has "King Kong is not bad" body.
wood anti-corrosion technology
wood is often affected by temperature, moisture, light, fungi and other factors, resulting in deformation, decay, insect decay and other phenomena, so that wood products life is shorter. In modern manufacturing, there are two main ways to prevent wood from rotting:
1. Wood surface coating anti-corrosion method
refers to the wood surface covered with a layer of isolation film to separate the wood from the outside world, to prevent wood from being affected by external factors and decay. Common brush paint, oil injection, glue and other ways. For example, pigments and epoxy adhesives used to pour wood surface, not only can increase the hardness and gloss of wood beauty but also waterproof corrosion, is widely used in tea plates, tabletops, fences and other products.
2. The internal anti-corrosion
wood is to prevent fungi and related organisms from destroying wood. Chemical anti-corrosion glue is usually used, which has the killing function of fungi and organisms, but also has a certain toxicity to the human body. At present, the more ideal method is to use wood debris with adhesive thermopress molding (commonly known as plywood), which has a strong waterproof and anti-corrosion than the original wood, and the physical performance of good durability.
metal anti-corrosion technology
whether inert or active metals are rigid in texture, but in the natural environment will be subject to different degrees of comprehensive corrosion, electrochemical corrosion, pitting, erosion, stress corrosion, intercrystalline corrosion and so on.
in modern industrial manufacturing, metals are treated according to their properties and environment of use in the following anti-corrosion processes:
. 1. Blue treatment of steel parts
The steel parts are heated to a certain temperature in a water vapor or chemical solution, and a black or blue oxide film is formed on the surface, thus improving the corrosion resistance of the steel parts, a process known as hair blue treatment. If the steel parts into the oxidant (NaNO2, NaNO3) and soda-producing solution, at 140-150 degrees C temperature, maintain 60-120 minutes, in the steel parts surface will produce a layer of Fe3O4-based porous oxide film, this film and the metal surface binding firmly, and then oil-soaked treatment to fill the pores in the oxide film, can effectively resist corrosion of the corrosive gas. Hair blue processing is widely used in automotive machinery parts, instrument parts and other anti-corrosion.
2. Galvanized
zinc is stable in dry air and is easily associated with carbon dioxide and oxygen in moist air, resulting in zinc carbonate and zinc oxide films that prevent zinc from continuing to damage. Zinc has a lower electrode pot than iron, which protects steel parts. At present, galvanizing is widely used in steel and aluminum alloy products.
3. The anode oxidation method of aluminum alloy parts
places aluminum products on the anode of the electrolyte tank of sulfate and generates a layer of oxide film on the surface of the part by current, which is called anode oxidation. The resulting oxidation film is firmly combined with the base metal, which not only improves the corrosion resistance of aluminum products, but also increases the wear resistance of the surface. Due to the porous nature of the oxidation film, it has a strong ability to absorb paint and adhesive, which is a good underlying process.
4. Passivation treatment
the metal surface and oxidizing medium, the metal surface to create a very thin, dense, well-covered, strong attachment to the metal surface passivation film. Such as copper parts in the instrument, often the copper parts immersed in the oxidant (chromium salt and sulfuric acid mixture) solution treatment for 2-3 minutes, the surface of the preparation is to produce a high chemical stability of the passivation film, thereby improving its corrosion resistance.
when a metal's corrosion-proofing process cannot be covered or destroyed, it is usually treated as follows:
. 1. Brushing corrosion-resistant coating glue
e.g. brushing a layer of epoxy anti-corrosion repair glue on the corrosive surfaces of valves, pumps, imperfles, pipes, reactors, tanks, etc., can enhance the performance of the protective metal and prevent metal corrosion.
2.Brushed polymerized ceramic coating
the inner wall of pipes, reactors, heat exchangers is often damaged by complex chemical media, cavitation, erosion, etc., usually brushed on its inner wall a layer of polymer ceramic coating to protect. Polymer ceramic coating is also a high-performance anti-corrosion product formed by the combination of adhesive and ceramic powder, which has a hard texture, stable performance and excellent corrosion resistance.
3.Brushing anti-rust paint
on exposure to the atmosphere of active metals or when metal anti-corrosion processes are destroyed (e.g. alloys cause severe local erosion at welding joints), it is common practice to paint a layer of rust-proof paint on its surface for protection.
Electronics anti-corrosion technology
electronic products are mainly composed of metal and polymer materials, which usually work in complex scenes such as lighting, radiation, chemical media, electric fields, magnetic fields, high-frequency vibration, water vapor, salt spray, temperature, microorganisms, etc. It is more corrosive and its anti-corrosion technology is difficult. Usually through the following methods of corrosion prevention:
1. anti-corrosion coating treatment of materials
such as polymer materials easy to receive oxygen, ozone, light, moisture and other factors caused by aging, can be added to the material anti-aging agent, brush anti-corrosion coating, etc. , metal materials can be passivated, blue, phosphorus, oxidation and approved organic coating and other ways of corrosion.
2. System anti-corrosion structure design and treatment
(1) product structure should prevent moisture or condensate accumulation;
(2) To prevent electrolytic corrosion: different metals and alloys to avoid direct contact, during which organic insulation or conductive glue can be used to isolate to avoid the phenomenon of electric couple
s;
(4) Prevention of stress corrosion: in areas sensitive to stress corrosion, such as areas prone to external stress, thermal stress or welding defects, incision exposure, etc., should consider the use of glue to disperse stress
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anti-mold technology for microorganisms
in a humid and dark environment, a variety of microbial mold easy to reproduce, will cause product stains and corrosion. Such as kitchen washbasin edge gap for a long time will produce mold black or yellowing. It can be improved with mold-resistant silicone. The principle is to use carbonation rate of 15% to 75%, the surface by the resin acid soap treatment of calcium carbonate as a filler preparation of mold-resistant silicone sealant, after vulcanization surface pH of 10, can effectively inhibit the reproduction of various molds.
trend of anti-corrosion products is
. 1. Trends in the replacement of metal materials by composite materials
2. The trend of low toxicity and non-toxicity of preservatives, the transition of organic solvents to inorganic solvents and water solvents, the transition from chemical corrosion to biological corrosion, and
3. anti-corrosion adhesives adapt to the trend of automation equipment.
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