Surface preparation is an essential step in fabrication, welding and painting of metal components, and is often carried out prior to any further processes. Common surface preparation techniques include degreasing, rust removal, shot blasting and more. Careful surface preparation will ensure proper adhesion, minimized user fatigue, and standardized appearance and quality of the finished product.
Degreasing is the process of removing grease, oil, and other contaminants from the surface of a material. This is a critical step in all surface preparation processes. Many processes rely on chemical solvents to break down stubborn bonds and remove oily, hydrocarbon-based residues. Some materials must be heated or steamed prior to degreasing for it to be successful. It is important to note that different materials require the use of different methods and products for degreasing.
Rust removal is a process used to remove corrosion from the surface of a material. Rust can be removed via abrasive blasting, or electrolytic rust removal which is an electrolysis-based method. Abrasive blasting is the most popular choice as it can remove corrosion while simultaneously creating an acceptable surface finish. Shot blasting is commonly used to remove corrosion and corrosion products from the surfaces of metals. Shot blasting involves propelling small pieces of abrasive material at the material’s surface at high speeds in order to remove surface material such as rust.
Sandblasting is similar to shot blasting in that it is an abrasive blasting technique. Sandblasting suspends abrasive particles in air or gas in order to remove surface contaminants. Sandblasting is an effective way to remove rust, paint, and other materials from surfaces without damaging the base material. The process is used to create a smooth surface as well as to strip substances or finishes from the surface.
Painting is often employed to protect a material from corrosion and to give a consistent appearance. Painting requires proper surface preparation; surfaces must be clean and free from imperfections for the best results. Sandblasting or shot blasting can create a desired surface finish that allows for the paint to adhere properly to the work piece surface.
Pre-treatment is an important step in the surface preparation process. Pre-treating a surface can prevent corrosion and remove surface contaminants before any fabrication takes places. Common pre-treatments include degreasing, blasting and priming of surfaces. Pre-treatment also helps create a micro-structure which aids in adhesion to the surface.
Surface preparation is essential prior to any further processes such as welding, painting or fabrication. Proper surface preparation will lead to improved adhesion, more consistent appearance and better surface finish. Degreasing, shot blasting and other assetment processes are required to prepare surface prior to any further processes. Pre-treatment is also essential to ensure the workpiece is protected from corrosion, and to allow better adhesion of subsequent products. Proper surface preparation is key to ensuring a successful end product.
