Why do industrial systems require anti-freeze/coolant in the summer?
1405/03/02
Cooling Tower Chemical Cleaning Steps — Implementation Guide
1405/02/07
Types of sediments in RO systems and methods for identifying them
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Benefits of using specialized solutions from Abrizan Company for MED
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Uniform corrosion inhibition
A) Corrosion Inhibition in Acidic Environments
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. Organic compounds containing multiple bonds are also useful inhibitors. High molecular weight organic compounds such as proteins and polysaccharides also have corrosion inhibitory properties.
The first step in the action of inhibitors in acidic solutions is usually the adsorption of the inhibitor onto the oxide-free metal surface. The adsorbed inhibitor then stops the electrochemical corrosion processes, either cathodic or anodic.
b) Corrosion inhibition in neutral environments
Corrosion of metals in neutral environments differs from their corrosion in acidic solutions in two ways:
- In neutral solutions, saturated with air, the main cathodic reaction is the reduction of dissolved oxygen and the production of hydroxide ions, while in acidic solutions, the hydrogen liberation reaction is the main cathodic reaction.
- In the neutral state, the metal surface is covered with oxide films, hydroxides, or poorly soluble salts. However, in acidic environments, these oxides are soluble. Due to this difference in mechanism, inhibitors for neutral and acidic environments are distinguished from each other. The basis of protection and inhibition in neutral environments is the formation of stable compounds on the metal surface.
c) Corrosion inhibition in alkaline environments
In alkaline environments, corrosion can be controlled or reduced by the rate of oxygen penetration into the corrosion product deposit. Some metals, such as aluminum, zinc, and lead, corrode slowly in alkaline environments. However, at pH values above 9, the corrosion rate becomes so high that inhibitors must be used.
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Why do industrial systems require anti-freeze/coolant in the summer?
1405/03/02Cooling Tower Chemical Cleaning Steps — Implementation Guide
1405/02/07Types of sediments in RO systems and methods for identifying them
1405/02/05Benefits of using specialized solutions from Abrizan Company for MED
1404/12/09
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