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Normal temperature slag-free rapid phosphating solution and preparation method thereof
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A phosphating solution and fast technology, applied in the field of phosphating solution, can solve the problems of long phosphating time, difficulty in phosphating coating, low free acidity, etc., achieve short phosphating time, low use temperature, and prolong cleaning cycle Effect
Active Publication Date: 2016-08-24
HUNAN JINYU ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology
Although the patented phosphating solution produces very little sediment during use, its free acidity is extremely low, resulting in difficulties in phosphating the film and long phosphating time.
Method used
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Embodiment 1
[0044] Every 1000Kg room temperature rapid phosphating solution is made of the following raw materials:
[0062] The preparation method is the same as in Example 1.
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Abstract
The invention provides a normal-temperature sludgeless fast phosphating liquid and a preparation method thereof. The normal-temperature sludgeless fast phosphating liquid is prepared from the following raw materials by mass percent: 10-20% of phosphoric acid, 6-10% of zinc oxide, 20-25% of zinc nitrate, 1-5% of sodium metanitrobenzene sulfonate, 0.5-2% of sodium citrate, 1-4% of ethylenediamine tetraacetic acid (EDTA), and the balance of water. The phosphating film copper sulfate droplet test time of the phosphating liquid disclosed by the invention can be up to 30 seconds, the neutral salt spray test time can be up to 4 hours, the adhesive force of a paint film can be up to 0 grade, meanwhile, the phosphating time is short, the work efficiency is greatly improved, the operating temperature is low, a phosphating sediment is basically not generated, the cleaning cycle is greatly prolonged, the solid waste treatment cost is reduced, and energy consumption does not need to be consumed.
Description
technical field [0001] The invention relates to the technical field of phosphating solution, in particular to a normal temperature slag-free rapid phosphating solution and a preparation method thereof. Background technique [0002] With the rapid development of the metal processing industry, the phosphating process is widely used in metal surface treatment, especially in the pre-treatment of painting (or spray painting). Most of the phosphating solutions currently used are medium and high temperature phosphating solutions (use temperature 55°C-95°C). Unfavorable factors such as large investment in chemical equipment, high energy consumption, large acid mist, poor solution stability, many sediments, cumbersome adjustments, and high pressure on environmental protection. [0003] Chinese patent CN102605364 discloses a medium-temperature, low-sludge, low-emission thick-film phosphating solution and its phosphating method. The components of the phosphating solution are: 3-5% of ...
Claims
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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/07
Inventor 桂成方
Owner HUNAN JINYU ENVIRONMENTAL PROTECTION TECH CO LTD
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