Xiamen City, Chung Feng processing equipment in the supply of machinery and equipment Co., Ltd. Shanghai area - pre-treatment spray - Gantry-style dipping equipment design and manufacturing. Xiamen City, Chung Feng coating equipment company is a professional manufacturer of painting equipment manufacturers. The pre-treatment equipment is part of the coating line. Division I has excellent product design and manufacturing team. 

 Coating pre-treatment 
 The coating pre-treatment including degreasing (degreasing), rust, in phosphide three parts. Phosphide is the central link, degreasing and rust is ready before the phosphating process, production practice, not only should phosphide as a priority, but also from phosphating quality requirements of starting, do a good job degreasing and in addition to rust work, with particular attention to the interaction between them. 
 1, degreasing rust 


 Quality phosphate coating is only formed on the go in addition to the surface of the oil material, rust, oxide and other foreign matter in completely. Residues in the surface oil, corrosion, oxidation leather will seriously hinder the growth of phosphate film. There will also affect the adhesion of the coating, drying performance, decorative properties and corrosion resistance of, to completely remove the foreign body is phosphating a necessary condition. Consider the above requirements, screening, degreasing and rust remover phosphide company XH-16C degreasing rust additives and checking the preparation, at room temperature, treatment time 10-30min, it can improve the rust speed to prevent the workpiece corrosion and hydrogen embrittlement, the inhibition of acid mist. 

 Formula: XH-16C 4% 
 HCL (35%) 60% H2O 

 2, washed 


 Washing, degreasing rust before painting the auxiliary processes, but the same need to attract enough attention. Degreasing rust easily attached to the surface after some non-ionic surface active agents such as CL-. If these residue cleaning is not complete, it may cause thinning of the phosphate film, resulting in linear defects, even phosphide on. Therefore, to improve the quality of washing after degreasing rust, the subject repeatedly rinsed two washing time of 1-2min, and regular replacement of water, ensure that the water PH value between 5-7 values. 
 3, phosphating 


 Phosphating, the metal workpiece after the acidic solution containing dihydrogen phosphate processing, the chemical reaction in the surface layer of stable insoluble phosphate film, generated by a membrane called the phosphate film. The main purpose of the phosphate film is to increase the film adhesion and to improve the coating corrosion resistance. Phosphating the phosphide temperature can be divided into high-temperature phosphide (90-98 ° C), phosphide in temperature (60-75 ° C), low temperature phosphating (35-55 ° C) and room temperature phosphating. Provide a good coating substrate, the phosphate film thickness is suitable for compact and small, crystallization. 4, passivation 


 Phosphide passivation film in North America and European countries are widely used, passivation technology is based on the characteristics of the phosphate film, the phosphate film is thin, generally In the 1-4g/m2, the largest not more than 10g / m2, the free pore area, the corrosion resistance of the membrane itself is limited. Some even during the drying process quickly, Wong rust after a passivation closed phosphide can be exposed in the pores of the phosphate film metal to further oxidation, or generate a passivation layer, the phosphate film can play a fill oxidation, so that the stability of the phosphate film in the atmosphere. 

 5, the phosphate film drying 


 Phosphate film drying process, can play the role of the two aspects, on the one hand, to prepare for the next process painting to remove the phosphate film surface of the water, on the other hand to further improve the coating film resistant erodibility. 


 Processing before the establishment of the coating production line, first to complete the process design, and then to non-standard equipment design, manufacture and installation. The process design is to create the basis of the production line, correct, reasonable line of manufacturing operations and product quality will have a good impact. 

 Process design including: the processing method, processing time, process. 
 Specific classification of the pre-treatment: pre-treatment of oxide on the surface before painting, rust, grease, dust and other dirt matter thorough cleaning processes, the coating powder and the metal surface with a solid, strong adhesion, so that the product access to high quality, extend the life of the product. 

 The general process of the pre-treatment as follows: 


 Skim ---- washing ---- Table tune ---- film ---- washed with water (be flexibly adjusted according to the workpiece characteristics). 


 The pre-treatment is divided into: spray, Immersion, diving three forms, depending on the workpiece and the specific production requirements approach. 


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