What is a Galvanizing Degreaser?
A galvanizing degreaser is a specialized cleaning agent designed to remove oils, greases, and other contaminants from metal surfaces prior to the galvanization process. These substances, if left on the metal, can interfere with the bonding of zinc to the base material, undermining the integrity of the final coating.
Degreasers play a crucial role in preparing metal surfaces for galvanization by removing both organic and inorganic contaminants. This cleaning process ensures the metal surface is free of oils, dirt, allowing for better adhesion of the zinc coating. This step is essential for producing a durable, corrosion-resistant finish that meets stringent industrial standards.
Types of Galvanizing Degreasers
Alkaline-Based Degreasers
Alkaline degreasers are widely used in industrial applications for their effectiveness in breaking down tough grease and oil deposits. Typically containing high pH compounds, these degreasers are ideal for ferrous metals and are commonly used in large-scale operations. However, they require high temperatures (50-95°C) to work effectively and necessitate thorough rinsing before being immersed in the acid tank. These extra steps make alkaline-based degreasers less practical, as they demand additional tanks and space, as well as high energy costs for heating, ultimately making them less cost-effective and efficient.
Acid-Based Degreaser
Acid-based degreasers, commonly used in the initial stages of chemical preparation for hot-dip galvanizing, effectively remove grease and other contaminants from steel surfaces. Composed of phosphoric acid, hydrochloric acid, or low-phosphoric acid, these degreasers often contain surfactants for improved cleaning efficiency and corrosion inhibitors to protect the base material. They are easier to use than alkaline-based degreasers because they do not require high temperatures, and materials can be directly dipped into the acid tank after use.
Importance of Effective Degreasing
Proper degreasing is essential for ensuring that the zinc coating adheres uniformly to the metal surface. Any residual oils or contaminants can prevent the zinc from bonding properly, potentially causing weak points that result in peeling or flaking of the protective layer.
Contaminants left on the surface can lead to imperfections such as pits, voids, or discoloration in the final galvanized product. Effective degreasing minimizes these defects, ensuring the final product is both structurally sound and visually appealing.
Anqa Degreaser: The Optimal Solution for Galvanizing
Our Anqa Degreaser is specifically formulated for use in hot-dip galvanizing plants (HDG). Based on a combination of phosphoric acid and hydrochloric acid, it contains surfactants for superior degreasing efficiency and corrosion inhibitors to prevent damage to the base material. This unique formulation reduces sludge formation during use and extends the time between necessary tank cleanings.
Key Features:
- Low Phosphoric Acid Content: Minimizes sludge buildup, requiring less frequent tank cleaning.
- Corrosion Inhibitors: Safeguard the steel from acid attacks.
- Optimal Efficiency: Best results when heated to 35°C, with a recommended concentration of 8-10% by volume of the tank.
- Low Consumption: Usage is minimal—around 1 kg per ton of galvanized material, depending on the surface area and oil content.
Anqa Degreaser ensures a thorough and efficient cleaning process, optimizing the galvanization process and contributing to the production of high-performance galvanized steel products.
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