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Manufacturing method of vacuum tinned plate

A manufacturing method and vacuum plating technology, applied in the field of metal material manufacturing, can solve the problems of easily corroded equipment, affecting product quality, high volatility of hydrochloric acid, etc., and achieve the effect of avoiding surface oxidation, eliminating pickling process, and excellent coating performance.

Inactive Publication Date: 2020-11-17
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of sulfuric acid pickling has the following problems: at room temperature, sulfuric acid pickling solution has poor dissolving ability to metal oxides, and increasing the concentration of sulfuric acid can not significantly increase its dissolving ability. If the pickling speed is increased by increasing the temperature, it will be easy Produces pickling and hydrogen embrittlement problems
Pickling with hydrochloric acid has the following problems: the required concentration of hydrochloric acid is high, the consumption is large, the cost is high, and the volatility of hydrochloric acid is large, it is easy to corrode equipment and pollute the environment
During this process, an oxide layer will also be formed on the surface of the tinplate. The oxide film is very sensitive to the reflow temperature. When the oxide film develops seriously, the tinplate will easily turn yellow, which poses a threat to passivation and oiling. high requirements, and the oxide film seriously affects the product quality

Method used

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  • Manufacturing method of vacuum tinned plate
  • Manufacturing method of vacuum tinned plate

Examples

Experimental program
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Effect test

Embodiment 1

[0038] In this embodiment, DC06 steel is selected as the substrate, chromium is used as the pre-coating material, and tin is used as the top layer. Prepare the corrosion-resistant coating according to the following steps (such as figure 2 shown):

[0039] ① Carry out chemical degreasing, electrolytic degreasing, rinsing and drying on the strip steel to remove pollutants such as grease and solid particles on the surface;

[0040] ②The steel strip enters the vacuum chamber that has been evacuated through the inlet vacuum lock. The surface of the steel strip is preheated to 250°C, and then argon gas is introduced to clean the surface of the steel strip with plasma. The cleaning time is 5 minutes;

[0041] ③Keep the vacuum degree of the vacuum chamber at 4×10 -3 Pa, select the magnetron sputtering coating process to deposit a chromium pre-coating layer on the surface of the steel plate, and the thickness of the pre-coating layer is 10nm;

[0042] ④Keep the vacuum degree of the...

Embodiment 2

[0047] In this embodiment, DC06 steel is selected as the substrate, chromium is used as the pre-coating material, and tin is used as the top layer. Follow the steps below to prepare the corrosion resistant coating:

[0048] ① Carry out chemical degreasing, electrolytic degreasing, rinsing and drying on the strip steel to remove pollutants such as grease and solid particles on the surface;

[0049] ②The steel strip enters the vacuum chamber that has been evacuated through the inlet vacuum lock. The surface of the steel strip is preheated to 200°C, and then argon gas is introduced to clean the surface of the steel strip with plasma. The cleaning time is 10 minutes;

[0050] ③Keep the vacuum degree of the vacuum chamber at 2×10 -2 Pa, select the magnetron sputtering coating process to deposit a chromium pre-coating layer on the surface of the steel plate, and the thickness of the pre-coating layer is 20nm;

[0051] ④Keep the vacuum degree of the vacuum chamber at 4×10 -2 Pa, u...

Embodiment 3

[0056] In this embodiment, DC06 steel is selected as the substrate, chromium is used as the pre-coating material, and tin is used as the top layer. Follow the steps below to prepare the corrosion resistant coating:

[0057] ① Carry out chemical degreasing, electrolytic degreasing, rinsing and drying on the strip steel to remove pollutants such as grease and solid particles on the surface;

[0058] ②The steel strip enters the vacuum chamber that has been evacuated through the inlet vacuum lock. The surface of the steel strip is preheated to 200°C, and then argon gas is introduced to clean the surface of the steel strip with plasma. The cleaning time is 10 minutes;

[0059] ③Keep the vacuum degree of the vacuum chamber at 2×10 -2 Pa, select the multi-arc ion plating process to deposit a chromium pre-coating layer on the surface of the steel plate, and the thickness of the pre-plating layer is 20nm;

[0060] ④Keep the vacuum degree of the vacuum chamber at 4×10 -2 Pa, a tin la...

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Abstract

The invention discloses a manufacturing method of a vacuum tinned plate. The manufacturing method comprises the following steps that S1, secondary cold-rolled strip steel is cleaned; S2, the cleaned secondary cold-rolled strip steel is subjected to pre-plating; S3, after tinning or tin alloy plating is conducted on the surface of the pre-plated secondary cold-rolled strip steel, soft melting treatment is conducted, and the tinned plate is obtained; and S4, passivation and oil removal are conducted on the tinned plate. The manufacturing method has the following beneficial effects that the acidpickling procedure is omitted; the problems of high pollution, many limiting links and the like in the electroplating process are avoided; and oxidation of a tin layer in the soft melting process is avoided. The technology is an environment-friendly, high-adaptability, high-production-efficiency and excellent-plating-layer-performance manufacturing method for the tinned plate.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacturing, and relates to a method for manufacturing a vacuum tinned plate. Background technique [0002] Tinplate is a cold-rolled low-carbon thin steel sheet or strip coated with pure tin on both sides, which combines the strength and formability of steel with the corrosion resistance, solderability and aesthetics of tin. At present, tinplate is mainly manufactured by electroplating tin on steel substrates by a continuous electroplating process. The electroplating tin method includes the following processes (such as figure 1 shown): chemical degreasing, electrolytic degreasing, pickling, electroplating, reflow, passivation and oiling. [0003] The pickling before the strip steel enters the electroplating tin bath is a weak pickling to remove the thin oxide film invisible to the naked eye. Generally, sulfuric acid or hydrochloric acid is used as the pickling solution. The use of sul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/16C23C14/26C23C14/32C23C14/35C23C14/58C23C14/02
CPCC23C14/16C23C14/165C23C14/26C23C14/35C23C14/325C23C14/5806C23C14/025
Inventor 汪义如熊斐李山青
Owner BAOSHAN IRON & STEEL CO LTD
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