Oxygen scavengers (also known as oxygen scavengers ) are chemical substances that chemically bind and remove dissolved oxygen in water-bearing systems. They are used to protect metallic system components from oxygen corrosion that occur in cooling circuits, boiler systems and other industrial water treatment systems. Oxygen that comes into contact with metal surfaces leads to electrochemical reactions that can cause material damage and significantly shorten the service life of the system.
Table of contents
Technical principles of oxygen corrosion
Oxygen corrosion is an electrochemical reaction in which oxygen is oxidized with the metal. This often produces iron oxide (rust). The process is particularly critical in systems in which metallic components are constantly in contact with oxygen and water.
The resulting rust weakens the mechanical stability and impairs the functionality of the systems.
Mechanism of action of oxygen binding agents
Oxygen binders neutralize dissolved oxygen through chemical reactions before it can cause corrosion. Different types of oxygen bin ders are used depending on the area of application and chemical requirements:
- Sodium sulphite (Na₂SO₃)
Reacts directly with oxygen to form sodium sulphate. Particularly suitable for boiler systems with medium to high temperatures.
- Sodium sulphite (Na₂SO₃)
- DEHA (diethylhydroxylamine) or hydrazine
bind oxygen and provide additional protection by forming a protective layer of magnetite (Fe₃O₄). These substances are particularly efficient in high-pressure boilers with high temperatures.
- DEHA (diethylhydroxylamine) or hydrazine
- Biodegradable alternatives that effectively bind oxygen and are suitable for environmentally friendly applications.
Photo: Surface corrosion and pitting
Areas of application
Cooling water treatment
In closed cooling circuits, the use of oxygen binding agents prevents corrosion in pipes and heat exchangers, thereby maintaining energy efficiency.Boiler water treatment
In steam boilers, especially in high-pressure systems, oxygen binders minimize the formation of oxygen corrosion on the boiler walls and in the pipes.Process water
In industrial processes where oxygen corrosion poses a risk, such as in the chemical industry or paper production.
Advantages of the application
- Extending the service life of system components by preventing pitting and stress cracks.
- Increased efficiency, as corrosion-related deposits in heat exchangers and boilers are prevented.
- Cost savings due to lower maintenance costs and longer maintenance cycles.
ALMAWATECH products: Oxygen binders
ALMAWATECH offers a comprehensive portfolio of oxygen bindersspecifically tailored to the requirements of cooling water and boiler water treatment are customized. Our ALMA AQUA boiler and ALMA AQUA cooling water product seriesinclude highly effective solutions that can be individually adapted to the chemical conditions of your system. Our products are Made in Germany and guarantee the highest quality and reliability.
Photo: Our Made in Germany equipment for boiler systems, hot water networks and cooling water treatment
Conclusion
Oxygen binders are indispensable components in industrial water treatment. They protect against corrosion, optimize plant operation and contribute to long-term cost reduction. ALMAWATECH offers innovative and customized solutions for every application.
For further information on our products, please feel free to contact us at any time!
