MED Desalination Chemical Washing Steps — Implementation Guide
1404/12/02
The three main enemies of cooling towers: scale, corrosion, biofouling
1404/11/29
Can antifreeze also prevent the formation of deposits and corrosion?
1404/11/27
What is a chiller and what are its types? A comprehensive guide to choosing the best cooling system
1404/11/20
Anti-corrosion mineral coatings
Anti-corrosion mineral coatings
These coatings, which are used to protect against corrosion, contain mineral compounds and are often made of glass and cement. The most important anti-corrosion mineral coatings are glass glazes, which are briefly described below.
Anti-corrosion glass glazes
Glass coatings, glass and porcelain glazes, are glass coatings that are sometimes coated on metals to protect them from corrosion. These coatings, which have a suitable thermal expansion coefficient, are applied in molten form to metal surfaces. First, the desired part is thoroughly cleaned by acid washing, then it is coated with glass powder and heated in a special furnace so that the molten glass can create a uniform coating on the entire surface of the part. Sometimes this process is repeated and several layers are created. Glass glazes are often used to coat steels and are sometimes also used for metals such as copper, brass and aluminum.
Containers and tanks that have a glass coating are known as enameled containers. These coatings are mostly used in the food and chemical industries. It is important to note that these coatings protect the metal from corrosion when they are free of any scratches or other defects. Glass glazes are also used to protect equipment from hot gases or vapors (for example, in aircraft exhaust pipes).
Anti-corrosion cement coatings
These coatings have many advantages depending on their applications. Among them is that they are inexpensive and have an expansion coefficient almost the same as that of steel. They are also easy to work with and have simpler repairs. These coatings can be applied centrifugally on the inner surfaces of pipes or by troweling or spraying. The thickness of these coatings is about 0.5-2.5 cm and if thicker coatings are needed, it is necessary to reinforce such coatings with wire mesh or iron wires.
One of the disadvantages of cement coatings is their sensitivity to thermal and mechanical shocks. Also, in waters containing high sulfates, such coatings may be attacked and damaged.
share :
MED Desalination Chemical Washing Steps — Implementation Guide
1404/12/02The three main enemies of cooling towers: scale, corrosion, biofouling
1404/11/29Can antifreeze also prevent the formation of deposits and corrosion?
1404/11/27What is a chiller and what are its types? A comprehensive guide to choosing the best cooling system
1404/11/20
Related Articles
Effect of chlorine ions on stainless steels
The effect of chlorine and chloride parameters on the corrosion of stainless steels and the parameters affecting their corrosion rate, as well as the acceptable limits of chlorine ion levels in water and the differences in the effects of free chlorine and chloride on the corrosion of corrosion-resistant steels, are stated.
Caustic corrosion
Localized corrosion caused by the concentration of caustic or alkaline salts, which usually occurs under conditions of high evaporation or heat transfer. Caustic salt or caustic soda is one of the most widely used ionic compounds and is used in various industries including water treatment, cardboard and paper production, oil and refinery industries, aluminum production industries, food industries, alcohol production and glass.
Corrosion and deposition of cooling water based on API 571
It refers to general or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds, or microbiological activity.
Microbial corrosion based on API 571
Microbial corrosion is a type of corrosion caused by living organisms such as bacteria, algae, or fungi. This type of corrosion is often associated with tubercles or slimy organic materials.
Corrosion process in different environments
Corrosion processes are divided into three groups in a more comprehensive classification: corrosion in aqueous solutions or environments, corrosion in molten salts and liquid metals, and corrosion in gases.
Oil-soluble corrosion inhibitor for the protection of oil transfer and storage equipment
Corrosion is a natural phenomenon that occurs as a result of the electrochemical reaction of metal with the surrounding environment. In the oil and gas industry, corrosion is one of the major problems that accounts for a huge amount of money annually. Part of these amounts are related to the corrosion of pipes or oil transmission lines. Effective ways to prevent corrosion of oil transmission and storage equipment are divided into two categories: physical and chemical solutions.
couponing
The coupon method or corrosion coupons is the simplest method of corrosion monitoring. Coupons are the oldest corrosion monitoring tool. Corrosion coupons are small pieces of metal or alloy of the material of interest that are immersed in the process medium and removed after a specified period of time and their weight or dimension loss is evaluated and examined.
Deaerators
Deaerators are mechanical devices that remove dissolved gases from the boiler feedwater. By reducing the concentration of oxygen and carbon dioxide in the solution, they minimize corrosion and protect the boiler from the effects of corrosive gases.
Submit your opinion
Your email address will not be published.