How Pickling and Oiling Processes Are Performed
Pickling and oiling are essential surface preparation processes performed before a metal part receives either a chemical or electrochemical coating. Their primary purpose is to remove oxidation, mill scale, annealing scale, casting residues, and surface contaminants such as welding residues.
In addition to cleaning the surface, these treatments create a controlled surface profile that improves coating adhesion by producing microscopic porosity, allowing protective finishes to bond more effectively.
Several types of acids can be used during the pickling and oiling process. The choice of acid depends on the desired treatment and the type of metal substrate being processed.
Industrial Applications of Pickling and Oiling
Corrosion inhibitors are commonly added during pickling and oiling to minimize or control the attack on the base metal. This helps reduce acid consumption while preserving the appearance and integrity of the treated component.
Another important factor is hydrogen embrittlement, which requires special attention throughout the process.
Hydrogen embrittlement occurs because hydrogen released during the chemical reaction can penetrate the metal's crystalline structure, reducing its mechanical strength at the molecular level.
Components that require particular care during pickling and oiling include fastening and safety-critical parts, especially those used in the automotive industry, such as:
- Stud bolts
- High-strength bolts
- Washers
- Belleville spring washers, particularly heat-treated components
Surface Treatment Specialists
Bento Sul Galvanization provides advanced surface treatment solutions that improve the durability, appearance, and corrosion resistance of components used in the automotive industry and many other industrial sectors.
To offer complete surface treatment solutions, the company operates specialized production lines for:
- Hard anodizing
- Zinc phosphate coating
- Manganese phosphate coating
- Pickling and oiling
- Cleaning and pickling
- Hydrogen de-embrittlement oven treatment
For more information, pricing, or a quote for Pickling and Oiling:
Send us a message on our WhatsApp.
Or send us a message through our Contact Page.
WhatsApp