Passivator used for powder zincizing metal workpiece and preparing method and application of passivator

A technology for metal workpieces and powder zinc infiltration, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of poor passivation effect, non-environmental protection and corrosion resistance of passivating agents, and achieve passivation Fast speed, good passivation effect, and easy industrialization

Active Publication Date: 2020-11-06
青岛隆世泰环保科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a passivating agent for powder galvanized metal workpieces and its preparation method and application, aiming to solve the problem that the passivating agent in the prior art is not environmentally friendly and has low corrosion resistance, resulting in poor passivation effect question

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  • Passivator used for powder zincizing metal workpiece and preparing method and application of passivator

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preparation example Construction

[0027] A preparation method of a passivating agent for powder sherardizing metal workpieces of the present invention comprises the following steps:

[0028] 1) taking water, heating the temperature of the water to 35-45 ° C, taking chromium trichloride, adding it to the water, stirring to obtain a chromium trichloride solution;

[0029] 2) get sodium nitrite, join it in the chromium trichloride solution of step 1) gained, stir, make it dissolve completely, obtain the first solution;

[0030] 3) get cobalt chloride and nickel chloride, join successively in the first solution of step 2) gained, stir, make it dissolve completely, obtain the second solution;

[0031] 4) take ammonium bifluoride, add it to the second solution obtained in step 3), stir to dissolve it completely, and obtain the third solution;

[0032] 5) get hydrogen peroxide, join in the third solution obtained in step 4), stir, make it dissolve completely, obtain the third solution;

[0033] 6) The third solutio...

Embodiment 1

[0041] A preparation method of a passivating agent for powder sherardizing metal workpieces of the present invention comprises the following steps:

[0042] 1) take by weighing raw materials according to the following parts by weight: chromium trichloride 5g, sodium nitrite 10g, nickel chloride 2g, cobalt chloride 5g, ammonium bifluoride 2g, mass concentration is 30% hydrogen peroxide 15mL, water 700mL;

[0043] 2) taking water, heating the temperature of the water to 35°C, taking chromium trichloride, adding it to the water, stirring to obtain a chromium trichloride solution;

[0044] 3) get sodium nitrite, join in the chromium trichloride solution of step 2) gained, stir, make it dissolve completely, obtain the first solution;

[0045] 4) get cobalt chloride and nickel chloride, join successively in the first solution of step 3) gained, stir, make it dissolve completely, obtain the second solution;

[0046] 5) take ammonium bifluoride, add it to the second solution obtained...

Embodiment 2

[0050] A preparation method of a passivating agent for powder sherardizing metal workpieces of the present invention comprises the following steps:

[0051] 1) take by weighing raw materials according to the following parts by weight: chromium trichloride 26g, sodium nitrite 20g, nickel chloride 4g, cobalt chloride 8g, ammonium bifluoride 6g, mass concentration is 30% hydrogen peroxide 25mL, water 700mL;

[0052] 2) taking water, heating the temperature of the water to 45°C, taking chromium trichloride, adding it to the water, stirring to obtain a chromium trichloride solution;

[0053] 3) get sodium nitrite, join in the chromium trichloride solution of step 2) gained, stir, make it dissolve completely, obtain the first solution;

[0054] 4) get cobalt chloride and nickel chloride, join successively in the first solution of step 3) gained, stir, make it dissolve completely, obtain the second solution;

[0055] 5) take ammonium bifluoride, add it to the second solution obtaine...

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Abstract

The invention discloses a passivator used for a powder zincizing metal workpiece and a preparing method and application of the passivator. Each liter of passivator comprises the following raw materials including 5 g-26 g of chromium trichloride, 10 g-20 g of sodium nitrite, 2 g-4 g of nickel chloride, 5 g-8 g of cobalt chloride, 2 g-6 g of ammonium bifluoride, 15 mL-25 mL of hydrogen peroxide andthe balance water. The invention further provides a preparing method of the above passivator and the application of the passivator in powder zincizing metal workpiece passivating treatment. By means of the passivator, the chromium trichloride is adopted as the main film forming compound, nickel chloride and cobalt chloride are introduced, and under the effect of the sodium nitrite, a passivating effect is achieved both on a zinc layer and a zinc-iron alloy layer on the surface of the powder zincizing metal workpiece. The neutral salt mist resisting performance of the metal workpiece obtained after passivating treatment of the passivator can reach 1200 h or above, and the corrosion resistance of the metal workpiece is improved. The passivator does not contain hexavalent chromium, carcinogenic raw materials do not exist, environment pollution is reduced, the passivating effect is good, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of passivating agents, in particular to a passivating agent for powder sherardizing metal workpieces and a preparation method and application thereof. Background technique [0002] At present, the existing anti-corrosion treatment technologies for metal workpieces such as steel mainly include electro-galvanizing and sherardizing technologies. Electro-galvanizing technology is one of the most traditional steel anti-corrosion treatment technologies. The technological process of electro-galvanizing is: (surface cleaning) pickling → galvanizing → passivation → drying → finished product. Electro-galvanizing technology is in the process of pickling and passivation. Pickling and passivation wastewater will be generated in the process, and wastewater treatment will be required. The sherardizing technology, also known as the powder sherardizing technology, places the sherardizing agent and the iron and steel parts i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/34C23C10/60C23C10/36
CPCC23C22/34C23C10/60C23C10/36C23C2222/10
Inventor 刘璐樊鑫刘蓓
Owner 青岛隆世泰环保科技有限公司
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