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Process Flow for the Use of Ceramics

Release time:

2022-08-09 09:56

How to control the quality of pretreatment is the key to stabilize and improve the quality of ceramic membrane. Only the reasonable design of pretreatment process, fully understand the relevant control elements of each pretreatment process, and carry out reasonable control and maintenance, can ensure the quality of pottery pretreatment.

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The quality of the ceramic treatment directly affects the service life of the subsequent coating and the important link of the decorative effect. The quality of the coating pretreatment is directly related to the quality of the coating.

Ceramic treatment process (process) has the following:Manual tank immersion type, automatic tank immersion type, automatic spray type, automatic swim immersion type, automatic dip spray combination, etc., most of which adopt automatic spray type and automatic dip spray combination mode. The cleaning principle of automatic spray type ceramic process is to complete degreasing, ceramic and cleaning by spraying mechanical force and chemical action.

Typical process flow of ceramic treatment includes: pre-degreasing-main degreasing-water washing-water washing-ceramic-water washing-water washing.

With the development of environmental protection, ceramic agent is a kind of metal phosphorus-free conversion agent, which can form nano-scale metal conversion film on the metal surface and improve the adhesion and corrosion resistance of the coating. It can handle steel, galvanized and aluminum parts, which is a good alternative to the traditional phosphating process new pre-treatment technology.

Compared with the traditional phosphating agent, the ceramic agent has the advantages of simple process, excellent performance, environmental protection and low cost. The surface adjustment process is omitted, and the process is simpler: degreasing→ water washing → ceramics → water washing (the specific process is adjusted according to the actual needs of the manufacturer), as long as the process parameters between the various processes are controlled, the ideal state can be achieved:

(1) Degreasing: The purpose of degreasing is to clean the oil and dirt on the surface of the workpiece. Degreasing agents of different types are selected according to the processing materials, which cannot cause corrosion to the workpiece. Degreasing process parameters control free alkalinity.

（2）Water washing: The purpose of water washing is to remove the residual liquid on the surface of the workpiece in the last treatment process. The quality of cleaning directly affects the quality of the workpiece and the stability of the whole process. The surface of the water washing tank shall generally be free of impurity suspension. Appropriate overflow, water washing tankThe pH should be neutral. If the pH value is too high or too low, it may affect the quality of the treatment.

(3): the purpose of ceramic is to generate a layer of inorganic zirconium salt conversion layer on the metal surface, the conversion layer has good antirust performance, and with a variety of coatings has a good matching, improve the coating binding force and corrosion resistance, ceramic process parameters control PH value and zirconium point.

 

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