Carbon Steel Pickling
Transflow (Scotland) Ltd
The primary reasons for Carbon Steel Pickling are to remove iron oxide, manufacturing deposits, production scale, and other impurities from the surface of steel by using an acidic solution. Pickling is also an essential step in preparing carbon steel for long-term service, especially in aggressive or corrosive environments.
Rust forms when iron or steel is exposed to heat or water and oxygen. This corrosion weakens metal parts, reducing the structural integrity and over time it can cause parts to fail leading to costly repairs, replacements and down time.
While Carbon Steel Pickling is primarily done to improve the appearance and prepare the steel for further processing (such as coating or painting), it can also play a role in extending the working life of carbon steel in certain conditions.
Prior to carbon steel pickling being carried out the carbon steel should be thoroughly cleaned to remove any surface contaminants, oils, or debris using solvents or detergents.
Before Cleaning
Carbon Steel Passivation
Transflow (Scotland) Ltd
After pickling, a passivating solution, often containing phosphates or other chemicals, is applied. This creates a temporary protective layer on the carbon steel surface. This layer helps to reduce the rate of corrosion but is not as durable as the natural oxide layer on stainless steel.
Passivation of carbon steel improves its corrosion resistance Proper chemical treatment (such as phosphating or acid immersion) can significantly increase its resistance to rust and corrosion. This treatment can be particularly useful for extending the lifespan of carbon steel in demanding environments where corrosion is a concern. However, for long-lasting results, passivation should be combined with other protective coatings and regular maintenance.
It’s important to note that passivation on carbon steel is not permanent. The protective layer can wear off over time, especially in harsh environments, so additional protective measures, such as coatings or regular maintenance, may be necessary.
At Transflow (Scotland) Limited (TSL), we apply our extensive experience in corrosion prevention to deliver high-quality carbon steel passivation services. Whether it’s part of a larger maintenance process or to address specific corrosion concerns, our team ensures that carbon steel surfaces are effectively treated to enhance their durability and performance in demanding environments.
After Cleaning