An environmentally friendly galvanizing process

An environmentally friendly and technological technology, applied in hot dip plating process, metal material coating process, coating and other directions, can solve the problems of polluting the factory workshop environment, affecting the health of workers, and spreading acid mist everywhere, so as to reduce erosion. , the effect of reducing volatilization and improving permeability

Active Publication Date: 2019-09-13
江苏国电新能源装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the pickling process in the above-mentioned galvanizing process, the process conditions are mostly open, and the acid mist will spread everywhere, polluting the factory workshop environment and affecting the health of the staff.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An environment-friendly galvanizing process, comprising the following process steps:

[0041](1) Degreasing: stack the metal components neatly, hoist the metal components in turn by driving and put them into the cleaning tank, and put in the aqueous solution of sodium dodecahydrate phosphate and sodium metaphosphate with a mass concentration of 5%. The substance ratio of sodium to sodium metaphosphate is 1:1, the water temperature is kept at 50°C, and the treatment time is 1 hour;

[0042] (2) Cleaning: place the degreased metal components in the washing pool, and use a NaCl solution with a mass concentration of 5% to rinse the surface of the metal components;

[0043] (3) Pickling: Put the rinsed metal components into the pickling tank, and put into the pickling tank a mixture of tea saponin aqueous solution and trivalent metal ion alginate with a concentration of 10%. The substance ratio of alginate to trivalent metal ion alginate is 1:1, the input amount of tea sapo...

Embodiment 2

[0052] An environment-friendly galvanizing process, comprising the following process steps:

[0053] (1) Degreasing: stack the metal components neatly, hoist the metal components in turn by driving and put them into the cleaning tank, and put in the aqueous solution of sodium dodecahydrate phosphate and sodium metaphosphate with a mass concentration of 5%. The substance ratio of sodium to sodium metaphosphate is 1:1, the water temperature is kept at 50°C, and the treatment time is 1 hour;

[0054] (2) Cleaning: place the degreased metal components in the washing pool, and use a NaCl solution with a mass concentration of 5% to rinse the surface of the metal components;

[0055] (3) Pickling: Put the rinsed metal components into the pickling tank, and put into the pickling tank a mixture of tea saponin aqueous solution and trivalent metal ion alginate with a concentration of 10%. The substance ratio of alginate to trivalent metal ion alginate is 1:1, the input amount of tea sap...

Embodiment 3

[0064] An environment-friendly galvanizing process, comprising the following process steps:

[0065] (1) Degreasing: Stack the metal components neatly, lift the metal components in sequence by driving and put them into the cleaning tank, and put in an aqueous solution of sodium dodecahydrate and sodium metaphosphate with a mass concentration of 10%, of which dodecahydrate phosphoric acid The substance ratio of sodium to sodium metaphosphate is 1:1, the water temperature is kept at 50°C, and the treatment time is 1 hour;

[0066] (2) Cleaning: place the degreased metal components in the washing tank, and use a NaCl solution with a mass concentration of 10% to rinse the surface of the metal components;

[0067] (3) Pickling: Put the rinsed metal components into the pickling tank, and put into the pickling tank a mixture of tea saponin aqueous solution and trivalent metal ion alginate with a concentration of 10%. The substance ratio of alginate to trivalent metal ion alginate is...

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Abstract

The invention discloses an acid circulation zinc-plating process. According to the technical scheme, the zinc-plating process mainly comprises the following steps of 1, degreasing; 2, cleaning; 3, acid pickling; 4, oxidation; 5, deironing; 6, acid liquor recycling; 7, auxiliary plating; 8, zinc plating; 9, cooling; and 10, chromate-free passivation and recooling. Before acid pickling is conducted,a mixture with the substance amount ratio of tea saponin to trivalent metal ion alginate being 1: 1 is dropped into an acid pickling tank; the tea saponin is a sugar type compound extracted from seeds of theaceae plants and composed of four parts, namely sapogenin, a sugar body, uronic acid and organic acid; after the tea saponin is mixed with the trivalent metal ion alginate, a film can be formed on the surface of a metal component conveniently; acid liquor is inhibited from continuously corroding the surface of the metal component; the acid pickling temperature is limited to be 40-50 DEG C;and after the metal component is dropped into the acid picking tank, the defects that acid mist generated in the acid pickling process is diffused everywhere, and the workshop environment is pollutedare effectively reduced.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an environment-friendly galvanizing process. Background technique [0002] In recent years, with the rapid development of high-voltage power transmission, transportation, and communication, the protection requirements for steel parts are getting higher and higher, and the demand for hot-dip galvanizing is also increasing. Hot-dip galvanizing is to melt the zinc ingot at high temperature, then add some auxiliary materials, immerse the metal component in the galvanizing tank, and attach a layer of galvanized alloy layer on the surface of the metal component. Usually the thickness of the cold-dip galvanized layer is 5-15 μm, while the hot-dip galvanized layer is generally above 35 μm, even as high as 200 μm. The hot-dip galvanized process has good coverage, dense coating, no organic inclusions, excellent corrosion resistance and service life. . [0003] At present, the Chinese pat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C23C2/02C23C2/26C23G1/14C23G1/02
Inventor 袁冲曹艺超朱更友
Owner 江苏国电新能源装备有限公司
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