Tinned steel plate surface treatment solution and preparation method thereof

A technology of surface treatment liquid and tin-plated steel plate, applied in the coating process of metal materials, etc., to achieve the effect of no reduction in sulfur resistance, simple surface treatment process, and easy implementation

Active Publication Date: 2015-02-18
深圳市九久电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although its composition does not contain chromium, the corrosion resistance, anti-sulfurization performance and coating adhesion performance of the treated tin-plated steel sheet can be further improved.

Method used

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  • Tinned steel plate surface treatment solution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A tin-plated steel surface treatment solution contains: 2g / L disodium hydrogen phosphate, 2g / L sodium pyrophosphate, 1g / L ammonium fluorotitanate, 1g / L potassium fluorosilicate, 2g / L nickel nitrate, 1g / L Zirconyl titanate, 1g / L sodium metaaluminate, 5g / L manganese dihydrogen phosphate, 2g / L sodium phytate and 1g / L oxalic acid.

[0024] A preparation method for a tin-plated steel surface treatment solution, comprising the following steps:

[0025] a. Weigh the components respectively, first add disodium hydrogen phosphate and sodium pyrophosphate into deionized water for stirring, control the stirring speed at 60 rpm, until completely dissolved;

[0026] b. Add ammonium fluorotitanate, potassium fluorosilicate, nickel nitrate, zirconyl titanate, sodium metaaluminate and manganese dihydrogen phosphate to the solution obtained in step a, then stir, and control the stirring speed to 40 rpm min, until completely dissolved;

[0027] c. Finally, add sodium phytate and oxalic...

Embodiment 2

[0029] A tin-plated steel surface treatment solution contains: 25g / L disodium hydrogen phosphate, 13g / L sodium pyrophosphate, 15g / L ammonium fluorotitanate, 10g / L potassium fluorosilicate, 14g / L nickel nitrate, 12g / L Zirconyl titanate, 10g / L sodium metaaluminate, 12g / L manganese dihydrogen phosphate, 5g / L sodium phytate and 7g / L oxalic acid.

[0030] A preparation method for a tin-plated steel surface treatment solution, comprising the following steps:

[0031] a. Weigh the components respectively, first add disodium hydrogen phosphate and sodium pyrophosphate into deionized water for stirring, control the stirring speed at 65 rpm, until completely dissolved;

[0032] b. Add ammonium fluorotitanate, potassium fluorosilicate, nickel nitrate, zirconyl titanate, sodium metaaluminate and manganese dihydrogen phosphate to the solution obtained in step a, then stir, and control the stirring speed to 42 rpm min, until completely dissolved;

[0033] c. Finally, add sodium phytate an...

Embodiment 3

[0035] A tin-plated steel surface treatment solution contains: 5g / L disodium hydrogen phosphate, 4g / L sodium pyrophosphate, 3g / L ammonium fluorotitanate, 5g / L potassium fluorosilicate, 5g / L nickel nitrate, 4g / L Zirconyl titanate, 2g / L sodium metaaluminate, 7g / L manganese dihydrogen phosphate, 3g / L sodium phytate and 2g / L oxalic acid.

[0036] A preparation method for a tin-plated steel surface treatment solution, comprising the following steps:

[0037] a. Weigh the components respectively, first add disodium hydrogen phosphate and sodium pyrophosphate into deionized water for stirring, control the stirring speed at 75 rpm, until completely dissolved;

[0038] b. Add ammonium fluorotitanate, potassium fluorosilicate, nickel nitrate, zirconyl titanate, sodium metaaluminate and manganese dihydrogen phosphate to the solution obtained in step a, then stir, and control the stirring speed to 48 rpm min, until completely dissolved;

[0039] c. Finally, add sodium phytate and oxalic...

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Abstract

The invention discloses a tinned steel plate surface treatment solution and a preparation method thereof. The surface treatment solution contains 2-25 g/L disodium hydrogen phosphate, 2-13 g/L sodium pyrophosphate, 1-15 g/L ammonium hydrofluotitanate, 1-10 g/L potassium fluosilicate, 2-14 g/L nickel nitrate, 1-12 g/L zirconium titanate, 1-10 g/L sodium metaaluminate, 5-12 g/L manganese dihydrogen phosphate, 2-5 g/L sodium phytate and 1-7 g/L oxalic acid. The preparation method comprises the following steps: a. adding the disodium hydrogen phosphate and sodium pyrophosphate into deionized water, and stirring; b. adding the ammonium hydrofluotitanate, potassium fluosilicate, nickel nitrate, zirconium titanate, sodium metaaluminate and manganese dihydrogen phosphate; and c. regulating the pH value of the solution to 3-5 with phosphoric acid. On the basis of chromium-free passivation, the surface treatment solution ensures the corrosion resistance of the tinned plate without degrading the sulfur resistance, and also has excellent paint adhesiveness.

Description

technical field [0001] The invention relates to the technical field of surface treatment of steel plates, in particular to a surface treatment liquid for tinned steel plates and a preparation method thereof. Background technique [0002] Tin-plated steel sheet is a product made of tin-plated on thin steel plate. As a metal packaging material, tin-plated steel sheet has good performance. Its characteristics include 1. Non-toxic, the tin layer itself is harmless to the human body, and it can be used as food packaging Very safe; 2. Beautiful appearance, easy to paint and print on the surface; 3. Tin itself has good corrosion resistance, protecting the substrate from corrosion; 4. Good solderability, easy to make containers; 5. Tin has good ductility 6. The tin layer is soft, and the tin layer will not crack or fall off. [0003] However, tin-plated steel sheets are easily oxidized and discolored in the air without special chemical treatment, and in special foods, black discolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/47
CPCC23C22/47
Inventor 尤为
Owner 深圳市九久电子科技有限公司
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