What are the anti corrosion methods and what are the methods of anti corrosion?

Anticorrosive wood is the ordinary wood after artificially adding chemical preservatives, so that it has the characteristics of anti-corrosion, moisture-proof, fungal-proof, anti-insect ants, mildew and waterproof, etc., can directly contact the soil and humid environment, often used in outdoor flooring, engineering, landscape, anti-corrosive wood trellis, etc., for people to rest and enjoy the natural beauty, is an ideal material for outdoor flooring, garden landscape, wooden swings, entertainment facilities, wooden plank roads, etc., favored by horticultural designers, but with the development of science and technology, Antiseptic wood has been very environmentally friendly, so it is often used in interior decoration, flooring and furniture, and interior decoration designers also like antiseptic wood very much. There is also a kind of preservative wood without preservatives - deep carbonized wood, also known as heat-treated wood. Carbonized wood is the effective nutrient of the wood is carbonized, and the decaying bacteria survive by cutting off....

Anti-corrosion is to protect metal items that are easy to rust by various means to achieve the purpose of prolonging their service life, usually using physical anti-corrosion, chemical anti-corrosion, electrochemical anti-corrosion and other methods.

At present, the main method of preservative treatment of wood of the same sex in the world is: the use of an insoluble water-based preservative, in a closed vacuum tank to apply pressure to the wood at the same time, the preservative into the wood avant-garde. After pressure treatment, the wood is more stable, and the preservatives can effectively prevent the attack of mold, termites and insects on the wood.

As a result, the treated wood has excellent corrosion resistance for long-term use in harsh outdoor environments. Treated wood, ideal for outdoor furniture; It has been widely used in foreign countries, such as courtyards, outdoor floors, marinas, fences, park chairs, flower stands, etc. References:

Anticorrosive wood enterprise network.

1. Vacuum preservation method: burial.

It is an effective method of using vacuum technology to preserve food, and it is now widely used to preserve inanimate food. It is particularly effective for those foods that are easy to change in color and flavor and require crispness, such as potato chips and banana chips on the market. It also has the effect of reducing consumption, delaying maturity, prolonging life, and inhibiting pests and diseases for living foods such as fruits and vegetables.

The vacuum preservation method has particularly high requirements for the pressure resistance of container materials, strict requirements for technology, large investment and high cost, so it cannot be widely used in large-scale production at present. However, one thing is certain, some noble medicinal materials, foods, raw materials, etc., which are small in size, are the objects of vacuum preservation in the first place.

2. Preservative:

It's a preservative. Food preservatives are food additives that can prevent spoilage caused by microorganisms and prolong the shelf life of food. Because it also has the effect of preventing the multiplication of microorganisms and causing food poisoning, it is also known as antimicrobial agent, which can inhibit the spoilage effect that is most likely to occur under different circumstances, especially when the general sterilization effect is not sufficient, it still has a sustained effect.

Mineral oil, coal tar, and denim for the preservative of fibers and wood, and formaldehyde, mercury, toluene, butylparaben, nitrofurfurhydrazone derivatives or balsam resins for biological specimens. The use of preservatives in food is restricted, so it relies on some physical methods such as drying and pickling. Special preservatives include organic acids such as acetic acid, vegetable oils with oleic acid as components, and special essential oil components such as mustard seeds.

3. Modified atmosphere preservation

In fact, it is similar to the essential principle of vacuum preservation, except that modified atmosphere preservation is to inhibit the growth of microorganisms by adjusting the composition of gas Pitcher's and replacing oxygen with inert gas.

1.Vacuum preservation method: As the name suggests, vacuum preservation method is to use vacuum technology to vacuum preserve inanimate ingredients that need to be preserved.

Of course, this technology can also protect living foods such as fruits and vegetables by reducing consumption, delaying ripening, and suppressing pests and diseases.

2.Modified atmosphere preservation method: The modified atmosphere preservation method is also one of the most widely used food blind guess Vipin preservation methods, which mainly uses the way to adjust the proportion of gas in the package to reduce water evaporation and inhibit the growth of microorganisms to achieve the purpose of food preservation.

3.Food preservative preservation method: food preservatives use chemical substances such as benzaldehyde, sodium benzoate, sorbic acid grinding and culture to coagulate or denature microbial proteins, destroy the cell wall or cell membrane of microorganisms, and inhibit the enzyme activity of organisms to achieve the purpose of preservation.

First, glass bottles (use second-hand old godmother-like bottles, pay attention to keep the lid).

Second, heat the homemade sauce to 90 to 100 degrees Celsius, put it in a glass bottle with a kernel bridge, and screw the cap.

Third, use a pot, add water, then heat it, and put it into the bottle where the sauce was just filled. Heat until the water boils, with a number of Paul's for 40 minutes, the latter longer. This is called water bath sterilization.

Theoretically, those sauces should be more than 10% salt at 4 percent, or vinegar, sterilized, and then refrigerated for one to three months or more!

Preservatives can be natural, and many of our daily foods have a preservative effect, such as garlic, bitter melon, some spices and so on.

The commonly used preservative methods of food can be stored in vacuum, frozen, refrigerated, and dried in the water. To the lack of preservatives and the like, it is recommended not to use it.

The methods of anti-corrosion are: 1. Brush paint on the metal surface or spray anti-rust oil. 2. The items should be placed in a ventilated and dry place.

Four. Drying: that is, the water in the perishable items is removed, and the active substances (such as enzymes, etc.) and microorganisms in the items stop moving, and the items will not rot.

Pickling: Perishable items are infiltrated in solid or liquid form with salt or other substances to keep the item at a high osmotic pressure.

state, let microorganisms and enzymes and other inactivation, the item will not rot.

Freezing: A liquid environment is required for the action of enzymes and for microorganisms to grow and reproduce. At extremely low temperatures, liquids solidify, and both enzymes and microorganisms are temporarily or permanently inactivated.

Chemical preservative: use chemical substances (such as formaldehyde, etc.) to treat perishable materials, inactivate the bioactive substances in them, and kill the microorganisms in them, so as to achieve the purpose of antiseptic.

Radioactive irradiation: with radioisotopes.

For example, CO60) irradiates perishable items, and uses high-energy atomic rays to destroy the bioactive substances in the articles and kill the microorganisms in them, so as to achieve the purpose of antiseptic.

1. The most used is anticorrosive paint, but the bottom, middle and top coat requirements should be made according to your process environment.

2. Pipes and equipment made of anti-corrosion materials can be selected, such as steel-lined PTFE, steel-lined PO, rubber, FRP pipes, plastic pipes such as UPVC and PE, and graphite equipment.

3. The metal pipe can also be wrapped with an epoxy resin brush with a glass cloth externally. The number of layers of the glass cloth bag is determined according to the process environment.

4. Connect with specific metal blocks and metal pipes, and use the principle of positive and negative ions for anti-corrosion, that is, cathodic anti-corrosion, but this should be based on your process environment to consult a professional unit in this area, which can be found on the Internet.

5. If you need to pre-corrosive the pool, use epoxy resin and anti-corrosive tiles or anti-corrosive cement (anti-corrosive cement is suitable for concentrated acids with less moisture).

6. In fact, the most important thing is that we must always pay close attention to the on-site running and dripping, and indiscriminately shooting acid and alkaline gas liquid.

Preservative can be used in low temperature refrigeration, usually can be used in the refrigerator, freezer to store food, for some can not be finished can be placed in the refrigerator, is the food in a low temperature state, can achieve the effect of preservative. It can also be sealed in cans, which can prevent the food from rotting and keep the food in a vacuum to prevent the air from being exposed to other bacteria.

There are two ways to prevent wood corrosion, one is to paint the wood grain paint that forms a film, which has the advantage of hard and bright surface, and is not easy to repair after damage; One is the wood wax oil that cannot be coated with a film, which has the advantage of reflecting the grain of the wood itself and is easy to repair, and the disadvantage is that the surface lacks luster.

Alloy steels are one of the most effective methods of corrosion protection, combining the properties of various metals to provide greater strength and resistance to the final product. For example, combining corrosion-resistant nickel with oxidation-resistant chromium can be used to create alloys that can be used in oxidizing and reducing chemical environments. Different alloys provide resistance to different conditions, giving companies greater flexibility.

Anti-corrosion is to protect metal objects that are easy to rust by various means to achieve the purpose of prolonging their service life, usually using chemical anti-corrosion, physical anti-corrosion, electrochemical anti-corrosion and other methods.

The methods and measures of antiseptic are: vacuum packaging, frozen storage, salted storage, air-dried storage, ......

What kind of anti-corrosion is this? If it is engineering, there can be epoxy resin, asphalt paint, anti-corrosion membrane and so on.

Anti-corrosion measures are generally considered from the following aspects according to the principle of corrosion and the structure of the structure:

1) Reasonable selection of materials. Reasonable selection of various metal or non-metallic materials according to the use environment;

2) Electrochemical protection technology, including cathodic protection and anodic protection and stray current discharge technology;

3) Surface treatment technology, such as phosphating, oxidation, passivation, surface conversion film technology, etc.;

4) Coating and coating technology, mainly including coatings, greases, coatings, linings, cladding, etc.'5) Environmental regulation, that is, improving environmental media conditions, such as the use of corrosion inhibitors in closed circulation bodies, adjusting pH value, degassing, deoxygenation, sterilization, desalination, etc.;

6) Correct design and construction, correct material selection and coordination from engineering and product design, reasonable geometric shape and surface state, strict construction technology, and correct protective measures, especially to prevent contact corrosion, stress corrosion, crevice corrosion and weld corrosion.

Generally speaking, there are only these types of anti-corrosion measures, but how to choose the appropriate anti-corrosion measures also needs to be judged according to the specific situation.

Anticorrosive coatings are required, glass flake cement is generally used, and when working on the metal base layer, the surface treatment method of dry sandblasting must be used. Maintain a certain level of cleanliness and rust removal requirements.

1. Preparation of glass flake cement. Add cement and curing agent, and add different substances according to different conditions.

2. Primer construction. The primer is prepared with the same or modified resin as glass flake cement, which is prepared according to the proportion of various materials, packaged in the construction container, and brushed with a roller brush;

3. Glass flake cement coating and rolling. The glass flake cement should be applied 12 hours after the completion of the second primer construction, and the glass flake cement should be evenly applied to the surface of the solidified primer in a one-way orderly manner with a spatula (or scraper), and the rolling operation should be carried out simultaneously with the smearing batch scraping;

4. Repair and enhancement. After the glass flake cement is formed, if there are certain defects and deficiencies, they must be repaired;

5. Top-coating construction. Stir the topcoat material evenly according to the ratio requirements, the first topcoat is dry and then the second coat is painted, and the two topcoats should be cross-coated;

6. Curing and curing. At room temperature, glass flake cement needs to be cured naturally for more than 7 days.

7.Finally, it is necessary to test the construction quality of glass flake cement, which is required to be smooth and flawless on the surface, and meet the quality requirements after instrument testing.