A process of hot-dip tin-plating alloy on the surface of stirrups

A hot-dip plating and tin alloy technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problem of high cost, and achieve the effect of increasing fluidity, increasing diffusion coefficient, and reducing melting point of plating solution

Inactive Publication Date: 2018-05-08
大连新锋钢管厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of use cost: a large amount of phosphating slag will be produced in the phosphating process, so a set of slag removal device is required to match it in the phosphating process; and the phosphating temperature is mostly 30-50 0 C, so auxiliary heating equipment and heat sources are needed to heat the phosphating tank; these all lead to higher cost of phosphating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of stirrup surface hot-dip tin alloy process, specifically comprises the following steps:

[0026] S1. Polish the surface of the stirrup with 200#, 800#, and 1000# sandpaper to remove burrs and debris generated during processing;

[0027] S2, alkali washing to remove oil: dip the stirrup in S1 in 50-60 0 C. In 25g / L sodium carbonate solution for 25-30min, remove oil stains;

[0028] S3. After the alkali cleaning is completed, rinse with water several times until the clean surface of the stirrup is exposed. The purpose is to prevent a small amount of alkali solution and surfactant sticking to the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0029] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min. The main purpose of pickling is to remove the scale, oxide film and alkali solution remaining on the surface of the stirrup matrix. After pickling, use pure water to clean the hoop. ...

Embodiment 2

[0038] A kind of stirrup surface hot-dip tin alloy process, specifically comprises the following steps:

[0039] S1. Polish the surface of the stirrup with 200#, 800#, and 1000# sandpaper to remove burrs and debris generated during processing;

[0040] S2, alkali washing to remove oil: dip the stirrup in S1 in 50-60 0 C. In 25g / L sodium carbonate solution for 25-30min, remove oil stains;

[0041] S3. After the alkali cleaning is completed, rinse with water several times until the clean stirrup surface is exposed. The purpose is to prevent a small amount of alkali solution and surfactant sticking to the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0042] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min. The main purpose of pickling is to remove the oxide skin, oxide film and alkali solution remaining on the surface of the stirrup matrix. After pickling, use pure water to clean the hoop Wa...

Embodiment 3

[0051] A kind of stirrup surface hot-dip tin alloy process, specifically comprises the following steps:

[0052] S1. Polish the surface of the stirrup with 200#, 800#, and 1000# sandpaper to remove burrs and debris generated during processing;

[0053] S2, alkali washing to remove oil: dip the stirrup in S1 in 50-60 0 C. In 25g / L sodium carbonate solution for 25-30min, remove oil stains;

[0054] S3. After the alkali cleaning is completed, rinse with water several times until the clean stirrup surface is exposed. The purpose is to prevent a small amount of alkali solution and surfactant sticking to the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0055] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min. The main purpose of pickling is to remove the oxide skin, oxide film and alkali solution remaining on the surface of the stirrup matrix. After pickling, use pure water to clean the hoop Wa...

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Abstract

The invention discloses a hoop surface hot dip coating tin alloy process. The hoop surface hot dip coating tin alloy process comprises the steps of sanding, alkali wash oil removal, acid pickling, plating assisting, preheating, hot dip coating and analysis and detection. According to the hoop surface hot dip coating tin alloy process, no harmful heavy metal ion or phosphorus or sediment exists, heating is not needed, the treatment time is short, the number of treatment steps is small, a surface adjusting procedure can be omitted, hot drip coating can be reused, and the adhesive force of a metal coating to a substrate is effectively improved.

Description

technical field [0001] The invention relates to the technical field of metal protection, in particular to a process for hot-dip tin alloy plating on the surface of stirrups. Background technique [0002] With the wide application of metal products in industry and life, the corresponding metal corrosion is also becoming more and more serious. Therefore, various anti-corrosion technologies are also widely used in metal processing, among which metal surface coating protection technology is the most widely used and most effective. [0003] At present, the pre-treatment of painting, powder spraying or electrophoresis is mainly phosphating and chromium passivation treatment according to the difference of the device plate. But all there is bigger defect in these two kinds of processing methods. In terms of environmental protection: phosphating contains heavy metal ions such as zinc, manganese, and nickel, and contains a large amount of phosphating slag. Chromium passivation treatm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/08C23C2/02C23C2/34
CPCC23C2/02C23C2/08C23C2/34
Inventor 文锋
Owner 大连新锋钢管厂
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