Acid Pickling Tube

Ronsco is a leading supplier of acid pickling tube in China, enowned for our exceptional production standards, strict quality control, extensive inventory, and unwavering commitment to excellence. We specialize in supplying acid pickling tube & pipe in various OD, ID, wall thickness and length, and cover a variety of materials such as austenitic stainless steel, duplex stainless steel, superalloy, pure nickel, nickel alloy, etc, to meet customers' needs for different projects.

In addition to on-demand production, we also offer an large inventory, regularly stock a variety of materials and specifications. Regardless of project size, we can all meet deadlines and deliver final products that meet or exceed industry standards.

Acid pickling is a a chemical cleaning process that uses the acidic solutions to treat the surface of metal. It is primarily used to remove oxides, rust, dirt, and other impurities from metal surfaces to achieve cleanliness, brightness, or improved surface properties. It can be divided into the following categories according to the pickling method:

• Immersion Acid Pickling: The metal workpiece is completely immersed in the acid solution, allowing the acid to fully contact the metal surface to achieve acid pickling. Immersion acid washing is suitable for small and simple-shaped workpieces, such as small metal parts and pipes. Its advantages include simple operation and uniform acid pickling results. However, the soaking time is relatively long, and the consumption of acid solution is relatively high.

• Spray Acid Pickling: The acid solution is sprayed onto the metal surface through nozzles, forming a thin layer of liquid film on the metal surface, which reacts chemically with the oxides and other impurities on the metal surface. Spray acid pickling is suitable for large workpieces or continuous production situations, such as acid pickling metal sheets and strips. It can achieve rapid acid pickling, improve production efficiency, and has a higher utilization rate of acid solution.

• Brush Acid Pickling: A brush is used to dip into the acid solution and scrub the metal surface. This method is suitable for local acid pickling or complex-shaped workpieces that are difficult to immerse or spray. Brush acid washing allows for control over the amount of acid solution used and the scope of acid pickling according to needs. However, it involves high labor intensity, and the acid pickling quality is greatly affected by the operator's skill level.

• Step 1 - Pre-treatment: Before acid pickling, it is usually necessary to pre-treat the metal surface. This includes removing oil, dust, and other impurities from the metal surface. For example, wiping the metal surface with gasoline or kerosene, or immersing the metal in an alkaline solution of sodium hydroxide to chemically decompose the oil, followed by rinsing with water. The purpose of pre-treatment is to reduce acid consumption during acid pickling, improve acid pickling results, and prevent the formation of harmful substances from the reaction of oil and other impurities with acid.

• Step 2 - Acid Pickling: Depending on the type of metal, the composition and thickness of the oxides, an appropriate acid pickling agent and acid pickling process parameters are selected. During acid pickling, the concentration, temperature, and acid pickling time of the acid solution must be controlled.

• Step 3 - Neutralization:  After acid pickling, the residual acid solution on the metal surface will continue to corrode the metal surface and affect it properties. Therefore, the acid pickled metal needs to be placed in a neutralization tank and neutralized with an alkaline solution (such as sodium carbonate or sodium hydroxide) to form neutral salt and water from the residual acid on the metal surface. After neutralization, the pH of the metal surface should be close to neutral.

• Step 4 - Rinsing: After neutralization, the metal surface may still have residual salts and other impurities. Therefore, rinsing is necessary. Rinsing is usually done with clean water to wash away the impurities from the metal surface. The purpose of rinsing is to ensure that the metal surface is clean and ready for subsequent processes, such as drying etc,.

• Step 5 - Drying: After rinsing, the metal surface will have residual water, which needs to be dried. Drying methods include natural drying and hot air drying. Natural drying involves placing the metal in a well-ventilated area to dry naturally. This method is simple but slow and highly dependent on environmental humidity. Hot air drying uses hot air to evaporate the water on the metal surface quickly. This method is suitable for situations where high production efficiency is required. After drying, the metal surface should be free of residual water, clean, and shiny, ready for subsequent processing or use.

Ronsco is a supplier with more than 28 years of experience in the metal tubes field, we always adheres to the business phiosophy of "customer-centered", tries its best to meet the requirements of customers and pursues win-win cooperation with customers. Are you looking for a reliable tubes manufacturer ! Contact Us Now! Email: manager@ronsteel.com