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Hot-dip galvanizing method for steel

A hot-dip galvanizing and steel technology, applied in hot-dip galvanizing process, metal material coating process, coating and other directions, can solve the problems of weak adhesion between the coating and the substrate, poor appearance quality of the coating, etc., to achieve excellent coating processing Formability, good coating adhesion, the effect of suitable thickness

Pending Publication Date: 2021-11-26
四川振鸿钢制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the prior art, during the hot-dip galvanizing process of steel, the bonding force between the coating and the base material is weak, resulting in poor appearance quality of the coating

Method used

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  • Hot-dip galvanizing method for steel
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  • Hot-dip galvanizing method for steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A hot-dip galvanizing method for steel, comprising the steps of:

[0031] (1) Pre-plating treatment: Treat the surface of the coated steel to prepare the steel for hot-dip galvanizing, so as to prevent the molten zinc from fully reacting with the steel during the subsequent hot-dip galvanizing process, and form the most perfect galvanized film composition ;

[0032] Pre-plating treatment includes the following steps:

[0033] a. Degreasing: immerse the iron and steel parts in the degreasing solution for degreasing, and the degreasing solution is a mixture of 7% to 10% hydrochloric acid and 1.5% to 2% degreasing inhibitor, and the degreasing temperature is 25°C to 50°C to remove steel The oil encountered by the parts during processing, storage and transportation;

[0034] b Pickling: Put the workpiece into hydrochloric acid with a mass fraction of 30% to 33% for pickling. During the pickling process, the workpiece is properly stirred, and the pickling temperature is co...

Embodiment 2

[0048] Embodiment 2, embodiment 3, embodiment 4 are identical with embodiment 1 hot-dip galvanizing method, and its difference is the matching of the zinc bath of embodiment 2, embodiment 3, embodiment 4 and embodiment 1 during hot-dip galvanizing than different.

[0049] Embodiment 1, embodiment 2, embodiment 3 and the concrete component and proportioning ratio of the zinc bath of embodiment 4 are as shown in table 1;

[0050] Table 1: Concrete components and proportioning of the zinc bath of embodiment 1, embodiment 2, embodiment 3 and embodiment 4

[0051]

[0052]

Embodiment 5

[0053] Embodiment 5, embodiment 6, embodiment 7 and embodiment 8 are the same as the hot-dip galvanizing method of the steel of embodiment 1, and its difference is embodiment 5, embodiment 6, embodiment 7 and embodiment 8 and embodiment 1. The components and proportions of the zinc bath are different during hot-dip galvanizing.

[0054] The composition and proportioning ratio of embodiment 5, embodiment 6, embodiment 7 and embodiment 8 zinc bath are as shown in table 2;

[0055] Table 2: Components and proportioning of embodiment 5, embodiment 6, embodiment 7 and embodiment 8 zinc bath

[0056]

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Abstract

The invention discloses a hot-dip galvanizing method for steel. The hot-dip galvanizing method for the steel comprises the following steps: pre-plating treatment: treating the surface of the plated steel to prepare for hot-dip galvanizing of the steel to avoid the situation that molten zinc cannot normally and completely react with the steel in the subsequent hot-dip galvanizing process; hot-dip galvanizing: immersing the steel subjected to pre-plating treatment in a zinc bath, enabling the steel to react with the molten zinc to generate an alloyed film, so that hot-dip galvanizing is completed; and post-plating treatment: carrying out post-treatment on the steel subjected to hot-dip galvanizing so as to avoid damaging the appearance of a galvanized film, wherein the zinc bath is prepared from the following raw materials in parts by weight: 97.5 to 99.5 parts of Zn, 0.035 to 1.5 parts of Fe, 0.025 to 0.12 part of Al, 0.1 to 0.2 part of Pb, 0.04 to 0.12 part of Ni, 0.05 to 0.15 part of Bi and 0.005 to 0.03 part of Ce. According to the hot-dip galvanizing method for the steel provided by the invention, by changing the components and the proportion of the zinc bath during hot-dip galvanizing of the steel, the binding force between a plating layer and a base material, namely the plating surface adhesive force, is enhanced, and the appearance quality of the plating layer is changed.

Description

technical field [0001] The invention relates to the technical field of hot-dip galvanizing, in particular to a method for hot-dip galvanizing of steel. Background technique [0002] The most widely used steel material in the industry, its corrosion occurs all the time. When it is used in environments such as air, seawater, soil and building materials, it will be corroded to varying degrees. According to statistics, the annual loss of steel materials due to corrosion in the world can account for about 1 / 3 of its total output. In order to ensure the normal use of steel products and prolong their service life, the anti-corrosion protection technology of steel has been widely valued by people. [0003] Zinc has triple protection for steel: (1) barrier layer protection: zinc can separate steel from the corrosive environment; (2) corrosion product protection: the surface of zinc itself is oxidized in the environment, and a dense corrosion product film will be formed , greatly r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/26
CPCC23C2/06C23C2/26
Inventor 石全中唐本标
Owner 四川振鸿钢制品有限公司
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