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Chromium-free passivation method for zinc powder

A technology of chromium-free passivation and zinc powder, applied in metal material coating technology, photovoltaic power generation, etc., can solve the problem of losing anti-rust pigments, etc., achieve good stability, unaffected electrochemical performance, and low environmental equipment requirements Effect

Pending Publication Date: 2022-06-07
上海库曜新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method makes the zinc powder completely wrapped and loses its function as an antirust pigment

Method used

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  • Chromium-free passivation method for zinc powder
  • Chromium-free passivation method for zinc powder
  • Chromium-free passivation method for zinc powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-15

[0045] Embodiment 1-15 relates to a kind of zinc powder passivation method, specifically comprises the steps:

[0046] S1. Add the general dispersing aid for water and oil into the water-soluble organic solvent, and stir evenly;

[0047] S2. Add zinc powder to the medium mixed evenly in step S1, and stir evenly;

[0048] S3. Add deionized water, molybdenum-containing compound, and silver hexafluoroantimonate into the uniformly mixed medium in step S2, and stir uniformly to prepare a passivated water-based zinc paste.

[0049] Wherein, after uniform stirring in step S2, in order to ensure uniform mixing, secondary stirring is performed for 20-90 minutes.

[0050] After the stirring is uniform in step S3, in order to ensure uniform mixing, secondary stirring is performed for 20-90 minutes. An aqueous zinc paste was prepared.

[0051]The substances and process parameters involved in the zinc powder passivation method of Examples 1-15 of the present invention are shown in Table...

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Abstract

The invention discloses a chromium-free passivation method for zinc powder. The preparation method comprises the following steps: adding a dispersing aid universal for water and oil into a water-soluble organic solvent, and uniformly stirring; adding zinc powder into the uniformly mixed medium, and uniformly stirring; and adding deionized water, a molybdenum-containing compound and silver hexafluoroantimonate, and uniformly stirring to obtain the passivated water-based zinc paste. According to a traditional zinc powder passivation method, zinc powder can be completely wrapped, so that the zinc powder loses the effect of an anti-rust pigment. According to the chromium-free passivation method for the zinc powder, the zinc powder can be stably stored in water for more than 6 months, and the electrochemical protection function of the zinc powder is not lost.

Description

technical field [0001] The invention relates to a chromium-free passivation technology for zinc powder; in particular, it relates to a chromium-free passivation technology for zinc powder, which can not only make zinc powder stably stored in water for more than 6 months, but also keep the electrochemical protection function of zinc powder not lost. method. Background technique [0002] At present, zinc-rich coatings on the market, as heavy-duty anti-corrosion coatings, have anti-corrosion properties unmatched by other coatings. However, since the zinc powder in the zinc-rich paint will react with water, this greatly affects the water-based nature of the zinc-rich paint. [0003] Water-based zinc-rich coatings on the market today are usually two-component, and zinc powder and another water-based component are temporarily mixed when used. This often results in short pot life, difficult field operations and high VOCs. [0004] Chinese patent CN104356938B discloses a chromium...

Claims

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Application Information

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IPC IPC(8): C23C22/42C23C22/44
CPCC23C22/44C23C22/42Y02E10/50
Inventor 姚下银王国强
Owner 上海库曜新材料有限公司
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