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Top 5 Benefits of Using Corrosion Inhibitors
Corrosion inhibitors generally backs off the rate of corrosion that is generally a substance intensifier that is added to liquid or gas from eroding any metal that it comes in contact with. It generally results with three mechanisms. A thin protective film is been produced by itself or in conjunction with metallic ions which is been absorbed by inhibitor molecule. It forms its own protective film thereby increasing its resistance. It reacts with corrosive substance in water.
There are various methods been used with corrosion inhibitor. One of the method been used is the Electrochemical methods. The advantage with this method is their short measurement time and mechanistic information. It is helpful in design of the corrosion protection strategies as well as the design of the new inhibitors
Basically there are three types of corrosion inhibitors asAnodic inhibitors, cathodic inhibitors mixed inhibitors.
Anodic Inhibitors: A chemical substance that forms a protective layer of oxide film on the surface of metal causing resistance to corrosion. They are also known as passivators. It alters the anodic reactions in a chemical cell, forcing the metallic surface into the passivation region. There is a strong relationship between the anodic inhibitors and corrosion rate.
It helps to reduce the corrosion rate due to its retarding anodic reactions.
Following are the compounds been used as anodic inhibitors
- Chromate
- Nitrite
- Molybdate
- Orthophosphate
Cathodic Inhibitors: Cathodic Inhibitors are generally been used to prevent access to the corrosive substance or material. The effectiveness of cathodic inhibitors depends on the flow regime, water quantity and the fluid composition.
It helps to reduce the corrosion rate due to its retarding cathodic reactions. It forms an insoluble compounds precipitating on the cathodic sites in order to form a barrier film.
Following are the compounds used as cathodic inhibitors
- Zinc salts
- Calcium salts
- Magnesium salts
- Polyphosphates
Mixed Inhibitor: It is a type of enzyme inhibition in which the inhibitor may bind the enzyme. It is known as mixed inhibitor as it is a conceptual mixture of competitive inhibition and uncompetitive inhibition. Here the inhibitor can be bind only of the substrate is been already found.The compound formed reduces both cathodic as well as anodic reactions. In order to prevent formation of rust water silicates and phosphates is been used
Several things are to be considered before choosing with the corrosion inhibitors for your application:
- Type of product whether it is oil, solvent of water based.
- Consider environment, health and safety requirements.
- Storage packaging and shipping conditions to be maintained according to temperature and humidity.
- Methods of application that includes dip, spray, brush etc.
- Define with the desired type and thickness of coating.
- Materials to be protected.
Following are the compounds used as Mixed Inhibitor
- Silicate
- Phosphate
- Liquids used in vehicles come in contact with metal parts. Using with this chemicals corrosion is been avoided
- Corrosion inhibitors are been added to the vehicles as the metal parts get rust when comes in contact
- Water systems get damaged due to the risk of rust, so the inhibitors are been added
- Corrosion inhibitors are required for pipe, due to rust it can contaminate with the liquid passing through the pipe.
- Tanks generally used to store water and fuel has the potential to get rust. It should be treated beforehand along with the corrosion inhibitors.
- Corrosion inhibitors mitigate the corrosion rates of pipelines resulting in improved long-term pipeline integrity.
- Along with the automotive industry there are other industries that benefits from corrosion inhibitors are open garden equipments, bike chains and loosen rusted scissor
- Another sector that benefits with corrosion inhibitor is the construction industry as many of the metals used are vulnerable to weather
- Metals like gates and railings are very much susceptible to rust, hence corrosion inhibitor is been used.
- Corrosion inhibitor extend the lifespan of the equipment up to 250%
- Reduces the cost of repair due to corrosive damage
- If the equipment is protected, service interruptions and operation malfunction can be avoided
- For companies having corrosion inhibitor equipments, can avoid legal and environmental liabilities