Angular single-use blasting abrasive based on blast furnace slag
The Right Selection of Blasting Abrasives Determines the Perfect Coating Result in Corrosion Protection
Suitable Blasting Abrasives for Corrosion Protection
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Corrosion Protection Begins with the Right Blasting Abrasive
Corrosion is one of the greatest enemies of metallic surfaces and structures. It occurs through the reaction of metal with oxygen, moisture, or chemical substances and ultimately leads to rust, material weakness, and loss of function. For protective systems such as paints, coatings, or galvanization to adhere and protect permanently, thorough surface preparation is crucial.
This is where blasting abrasives for corrosion protection come into play. Blasting not only cleans surfaces but also specifically roughens them to improve the adhesion of subsequent layers. An optimally blasted substrate is free of rust, scale, oil, grease, or old coatings, thus providing the perfect foundation for a durable coating.
Why Blasting Abrasives are Indispensable for Corrosion Protection
When it comes to corrosion protection through coating, adhesion is critical. Every protective layer – be it paint, powder coating, or galvanization – requires a firm, clean, and uniformly roughened substrate. Only then can it fulfill its protective function for years to come.
The right combination of blasting abrasive, blasting pressure, and grit size allows for achieving various degrees of cleanliness (e.g., Sa 2½ or Sa 3 according to ISO 8501–1) and roughness profiles. Both are crucial for high-quality corrosion protection systems.
Blasting abrasives perform several tasks simultaneously:
Removal of rust, scale, oil, grease, paints, and other contaminants.
Creation of a defined surface structure for optimal adhesion.
Increase of surface energy, which is important for a uniform coating.
Creation of a uniform surface that can be easily further processed.
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Blasting Abrasives as the Key to Successful Corrosion Protection
The use of high-quality blasting abrasives is the foundation of every successful corrosion protection system. Only a cleanly blasted, uniformly roughened surface ensures permanent adhesion and long-term protection of metals against corrosion.
The correct selection of blasting abrasive ensures optimal results, economical processes, and durable coatings. Investing in thorough surface preparation saves long-term costs for maintenance, rework, and repairs, and significantly extends the lifespan of your systems and components.
Tips for Optimal Blasting Abrasive Application
Pay attention to material compatibility, desired roughness, and cleaning performance. For example, stainless steel must never be treated with ferrous blasting abrasive, as this can lead to flash rust.
Fine-grained blasting abrasives produce smoother surfaces, while coarse-grained ones create greater roughness. The blasting pressure should be chosen to thoroughly clean the surface without damaging it.
Worn blasting abrasive loses its effectiveness. Regular screening and cleaning in the abrasive recovery system ensure consistent results.
Freshly blasted metals react quickly with humidity and begin to oxidize. Priming or coating should therefore take place within a few hours.
Use enclosed blasting systems or site enclosures to minimize dust generation. Also, ensure proper disposal of used blasting abrasives, especially for mineral or metallic types.