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Method of Pickling Phosphating

Method of Pickling Phosphating

Product overview：

The combined method of pickling and phosphating is commonly used in metal manufacturing to prepare steel surfaces for improved corrosion resistance, paint adhesion, and overall surface quality. Here's a general overview of the process:
Pickling and Phosphating Process:
Surface Preparation:
The metal parts to be treated are first cleaned of any loose dirt, oil, or contaminants to ensure effective pickling and phosphating.
Pickling:
Chemical Bath Preparation: A pickling solution is prepared, which typically contains acid, such as hydrochloric acid (HCl) or sulfuric acid (H2SO4). The concentration and composition of the acid solution may vary depending on the specific requirements.
Immersion: The metal parts are immersed in the pickling bath for a specific period. The acid reacts with and removes any contaminants, rust, scale, and oxides from the surface of the metal.
Rinsing:
After pickling, the metal parts are thoroughly rinsed to remove residual acid and contaminants. This step is essential to neutralize the acid and prevent any adverse reactions during the subsequent phosphating process.
Phosphating:
Chemical Bath Preparation: A phosphating solution is prepared, typically containing phosphoric acid, and often other additives like zinc or manganese to enhance the phosphate conversion coating.
Immersion: The metal parts are immersed in the phosphating bath for a specified time. The phosphoric acid reacts with the clean metal surface, forming a phosphate conversion coating.
Rinsing:
Similar to the pickling step, the metal parts are rinsed thoroughly to remove excess phosphating solution and to promote proper formation of the phosphate conversion coating.
Drying:
The treated metal parts are dried to ensure the phosphate conversion coating adheres properly and uniformly to the metal surface.
Application of Additional Coatings (Optional):
Depending on the specific application, additional coatings or treatments may be applied to the phosphated surface. This can include paint, powder coating, lubricants, or other surface treatments.
Quality Control:
The treated metal parts are inspected for quality, including the integrity of the phosphate coating and any additional coatings or finishes.
This combined pickling and phosphating process results in a metal surface that is clean, corrosion-resistant, and suitable for further treatments, such as painting or powder coating. It is commonly used in industries where steel or other metals need to meet stringent performance and aesthetic requirements, such as automotive manufacturing, where painted surfaces need to be durable and have excellent adhesion. Specific details of the process, such as chemical concentrations and process parameters, may vary depending on the specific requirements and industry standards.

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We are a source manufacturer of professional steel wire, we also have our own international trade department, we produce and sell by ourselves.
 
Ningbo SunRise Refined Metal Wire Material Co., Ltd. is China Custom Method of Pickling Phosphating Suppliers and Method of Pickling Phosphating Factory. We not only brought in 10 sets of spheroidizing annealing furnaces, dozens of metal wiredrawing equipments and twoworld's leading automatic phosphating pickling lines, but also engaged senior engineers as consultants fromTaiwan. The raw material that we use are supplied by the well known suppliers such as Bao Steel Co., Ltd and Xingtai lron & Steel Corp., Ltd. Also, the domestic lron & Steel manufacturers can be nominated by our customers.
 
We mainly produce steel wire made of alloy steel, bearing steel, free-cutting steel, high-quality carbon structural steel, low-alloy high-strength structural steel and other materials as raw materials. The annual output is 360,000 tons. It is one of the largest finished wire production bases in Ningbo. We serve all kinds of fasteners, special-shaped parts, automotive fasteners, wind power, petroleum and other fields. Ningbo SunRise is able to meet the high quality requirements of our customers throughout the whole operation process from raw materials to finished products.

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