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Environment-friendly passivation solution and passivation process for metal component

A technology of metal components and passivation solution, which is applied in the direction of metal material coating process, etc., to achieve the effect of good compactness, improved stability and low price

Pending Publication Date: 2022-07-05
FUJIAN HONGGUAN ROADS & BRIDGE ANTI CORROSIVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And so far, there is no good chromium-free passivation solution that is generally accepted by people.

Method used

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  • Environment-friendly passivation solution and passivation process for metal component

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Embodiment 1～7

[0033] Embodiments 1 to 7: an environmentally friendly passivation solution and passivation process for metal components, the components and their corresponding parts by weight are shown in Table 1. The ratio of phytic acid and silane is 1:1.2. Adjust the pH value of the passivation solution in Examples 1 to 7 to 2.5 (adjusted with hydrochloric acid).

[0034] Each component and its parts by weight in the embodiments 1 to 7 of table 1

[0035] component Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 epoxy resin 20 25 22 23 23 22 22 sodium molybdate 20 25 23 22 22 23 23 Sodium Silicate 10 15 11 13 0 11 11 Boric acid 2 3 2.5 2.2 2 2.5 2.5 Hydrogen peroxide 6 8 7 7.5 6 0 7 Lanthanum chloride 6 10 7 8 6 7 0 silica 5 12 8 10 5 8 10 Phytic acid and Silane 15 20 16 18 15 16 18

Embodiment 8～14

[0036] Embodiments 8 to 14: a passivation process for an environment-friendly passivation solution for metal components, using the environment-friendly passivation solution in Examples 1 to 7 as construction objects, combined with figure 1 , and its specific technological process is: seepage inspection, surface purification, hot water washing, hot air drying, passivation, and drying. The degreasing agent adopts ordinary detergent, and the temperature of hot water rinsing and hot air drying is 45℃. After the hot water rinsing and hot air drying are completed, the temperature of the workpiece is controlled at 40℃. During passivation, put the galvanized workpiece into an oven at 40°C for heating, take it out and fix it, transfer the passivation solution to the surface of the workpiece, apply it evenly, and put it into an oven at 55°C to dry for 15s to obtain passivation. after the workpiece.

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Abstract

The invention discloses an environment-friendly passivation solution for a metal component and a passivation process. The environment-friendly passivation solution comprises the following components in parts by weight: 20-25 parts of a binder, 20-25 parts of molybdate, 10-15 parts of sodium silicate, 2-3 parts of boric acid, 6-8 parts of an oxidizing agent, 5-10 parts of an organic auxiliary agent, 6-12 parts of rare earth salt and 15-20 parts of phytic acid and silane in total. The passivation process comprises the steps of infiltrated layer inspection, surface purification, hot water flushing, hot air blow-drying, passivation and drying. The passivation solution and the passivation process have the advantages of no toxicity and no pollution, are suitable for later-stage passivation treatment of the zincizing steel, improve the corrosion resistance of the zincizing steel and enable the zincizing steel to adapt to the complex natural environment.

Description

technical field [0001] The invention relates to the technical field of metal rust prevention, in particular to an environment-friendly passivation solution and a passivation process for metal components. Background technique [0002] Herdizing steel is now more and more widely used in the field of high-speed rail, and the stability and safety of high-speed rail operation depend on the reliability of its track quality. Because steel has been in the natural environment for a long time and is eroded by the environment, ordinary steel often cannot provide reliable safety for the operation of high-speed rail. So the steel obtained by sherardizing treatment came into being. In the face of the natural environment, the corrosion resistance of steel is often very important. Materials with poor corrosion resistance are prone to rust under the influence of the environment, which creates a safety hazard. [0003] A thin, dense and stable passivation protective film is formed on the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/42
CPCC23C22/42C23C2222/20
Inventor 谢华标罗长虹罗贯虹李瑞平李伟良陈秀香陈镇平丘丽华钟玲燕邓丽琴张飒余煜玺魏永金
Owner FUJIAN HONGGUAN ROADS & BRIDGE ANTI CORROSIVE TECH
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