Abrizan articles

Any process in which heat is absorbed is called refrigeration. In general terms, a refrigerant is a substance that acts as a cooling agent by absorbing heat from a substance.

Anti-corrosion of metals is a very important product that all industries need for the durability of their equipment.

Anti-fouling is a protective coating for your air conditioner or cooling device at home or at work. This is a summary of the optimal performance of an anti-fouling coating. The air conditioner tries to produce cool air by evaporating water. The salts left over from the evaporation of water cause problems for the engine and parts of the air conditioner, and the role of the anti-fouling is to protect the air conditioner from the harmful effects of this fluid.

People are forced to put up with the corrosion of their installations, but they use water in their systems, because water plays its role in heat exchange in all heating and cooling systems well, although it does not play this role flawlessly.

Neutralizers reduce corrosion by reducing the concentration of H+ ions in the solution.

Some organic compounds with low vapor pressures of about 10-2 to 10-7 mmHg evaporate in a closed space and become liquid on the surface to be protected. These inhibitors increase the corrosion resistance of the metal in corrosive environments. Vapor phase inhibitors are particularly useful for preventing atmospheric corrosion. Atmospheric corrosion results from the single or combined action of moisture, oxygen, and atmospheric pollutants such as SO2, NO2, as well as rain, snow, dust, soot, ash, wind, and radiation.

Corrosion of metals in acidic environments can be inhibited by a variety of substances. These substances can include simple elements such as chloride, bromide, or iodide ions, or organic compounds, especially those containing elements from groups V and VI of the periodic table such as nitrogen, phosphorus, arsenic, oxygen, sulfur, and selenium in their functional groups.

A scavenger reacts with dissolved oxygen in a system, preventing the reduction of oxygen to hydroxide ions. Although the interactions between the metal, the scavenger, the pH of the environment, and other dissolved components are complex, scavengers can be considered corrosion inhibitors, most of which involve chemical interactions between the metal and the inhibitor at the metal-water interface.

Localized corrosion occurs on metals that are coated with rutile layers. This can be caused by defects or breakage of the rutile layer. Attacking ions such as chloride cause the rutile layer to break down at weak points on the metal surface. In this case, the bulk of the metal is in a rutile state while small localized areas of it are in an active state.

Today, due to the understanding of the metal-electrolyte system, it has become common to prevent corrosion with the help of corrosion inhibitors. Inhibitors are chemicals that, when added in small amounts to a corrosive environment, greatly reduce the rate of corrosion. The composition and types of inhibitors are very diverse. One of the most important ways to classify these materials is based on their mechanism of action and composition.

Large factories, especially in the oil, gas and petrochemical industries, have engineering groups that work directly with designers to reduce corrosion. Materials engineers have a good understanding of the processes and corrosion issues that exist in manufacturing plants. They come to designers to advise on design problems.

Changing the corrosive environment is a common method for reducing and preventing corrosion. Environmental changes are affected by parameters such as temperature changes, oxygen concentration changes, velocity changes, concentration changes, composition changes, and moisture content changes.

Some of the coatings used today include materials made using nanotechnology. These methods include composite thin film coatings, topcoat coatings, and surface passivation layers. They are called nanocoatings.

The use of nanoparticles in the manufacture of anti-corrosion coatings is one of the most important achievements of nanotechnology. Important functions of nanoparticles in corrosion control include improving barrier properties, cathodic protection, anodic protection, and increasing the adhesion properties of the coating.

Organic coatings protect metal from the environment in the form of a very thin layer. Varnishes, paints, enamels, bituminous rubbers, and plastics are organic coatings that can partially cut off the metal from the environment and thus protect metals. An important factor in the development of organic coatings is the petroleum industry, which produces the main components of chemical resins.

These coatings, which are used to protect against corrosion, contain mineral compounds and are often made of glass and cement. The most common mineral anti-corrosion coatings are glass glazes.