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Phosphating production method for automobile galvanized plate

A technology of phosphating treatment and production method, which is applied in the field of phosphating treatment process of automobile plates, can solve the problems of failure to find out, yellowing and blooming of phosphating plate surface, and achieve the effect of quality assurance

Active Publication Date: 2016-08-24
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the lack of experience in the production of similar units, there is no complete set of galvanized sheet phosphating process production methods. When the production conditions fluctuate, the quality of the phosphating sheet cannot be guaranteed stably, resulting in deviations from the target value of the phosphating film thickness and phosphating particle size. , as the production time continues, key quality parameters such as film thickness become more and more difficult to control
The phosphating board products produced have problems such as yellowing, blooming, coarse grains, thicker film thickness, color difference, watermarks and other problems. Although the unit is also looking for reasons in various production links, they have not been able to solve this problem. Also failed to identify the key influencing factors

Method used

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  • Phosphating production method for automobile galvanized plate
  • Phosphating production method for automobile galvanized plate
  • Phosphating production method for automobile galvanized plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] In order to better illustrate that the products prepared by the phosphating process of the present invention meet the standard requirements, further description will be made below in conjunction with specific examples.

[0104] In this implementation, five identical galvanized sheets are preferred, respectively labeled as 1, 2, 3, 4, and 5;

[0105] And ensure that the five galvanized sheets are completely activated and phosphated according to the process parameters in Table 2.

[0106] Table 2 Phosphating process parameters of galvanized sheet 1 to galvanized sheet 5

[0107]

[0108]

[0109] Above-mentioned galvanized sheet 1 ~ galvanized sheet 5 are processed by phosphating process, respectively obtain phosphating sheet 1, phosphating sheet 2, phosphating sheet 3, phosphating sheet 4 and phosphating sheet 5, for phosphating sheet 1 ~ The phosphating plate 5 is subjected to the neutral salt spray test, that is, the phosphating plate is placed in the test box, ...

Embodiment 2

[0116] In order to compare with the phosphating plate produced and prepared in Example 1, select the phosphating plate not prepared completely according to the process parameters required in Table 1, and the process parameters are as shown in Table 4, and the performance of the prepared phosphating plate is shown in the table 5.

[0117] Get two galvanized panels exactly the same as the galvanized panels used in Example 1.

[0118] Phosphating process parameters of galvanized sheet in table 4 comparative examples

[0119]

[0120] The performance test was carried out on the phosphating plate after meeting the above process parameters, and the table 5 was obtained.

[0121] The performance parameter of phosphating plate in the comparative example of table 5

[0122]

Phosphate film thickness (mm)

Grain microscopic size (μm)

Comparative example 1

2.8

5.0～6.0

Comparative example 2

3.4

6.0～7.0

[0123] It can be seen from Tabl...

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Abstract

The invention discloses a phosphating production method for an automobile galvanized plate and belongs to the field of automobile plate phosphating processes. The production method comprises the following steps of 1, solution compounding; 2, slag discharging; 3, titration; 4, control over phosphating process key points; 5, treatment of abnormal process in the phosphating process. Technological parameters in the activating treatment and phosphating processes are strictly controlled and adjusted in time, and quality of the phosphorized plate is guaranteed. Meanwhile, corresponding countermeasures are taken to solve abnormal problems existing in the production process, and therefore by means of the whole set of complete phosphating production method for the automobile galvanized plate, product quality is guaranteed.

Description

technical field [0001] The invention belongs to the field of phosphating treatment technology for automobile plates, and in particular relates to a production method for phosphating treatment of automobile galvanized plates. Background technique [0002] Conventional steel plates are smelted and cast into slabs, and then undergo hot rolling→pickling continuous rolling→continuous annealing→electrogalvanizing→phosphating treatment process or hot rolling→pickling continuous rolling→hot dip galvanizing→phosphating treatment process. Among them, the phosphating process of galvanized sheet is carried out in a dilute solution of phosphate, and the process of forming an insoluble tri-system phosphate film on the surface of the zinc layer through chemical reaction. The galvanized sheet after phosphating treatment has excellent stamping and coating properties, so it is favored by high-end automobile manufacturers and home appliances. [0003] The structure of the phosphating film for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07C23C22/77C23C22/86
CPCC23C22/07C23C22/77C23C22/86
Inventor 董蓓柯聪杨成志雷泽红宋乙峰涂元强胡岸松
Owner 武汉钢铁有限公司
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