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Tinplate production process for composite coating and tinplate

A technology of composite coating and production process, applied in the field of tinplate, can solve problems such as difficult welding and affecting use

Pending Publication Date: 2020-10-20
ZHONGSHAN ZHONGYUE TINPLATE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrochrome-plated thin steel plate is difficult to weld due to the conventional method of plating metal chromium, which affects its use.

Method used

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  • Tinplate production process for composite coating and tinplate
  • Tinplate production process for composite coating and tinplate
  • Tinplate production process for composite coating and tinplate

Examples

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Embodiment 1

[0030] Such as figure 1 As shown, the embodiment of the present application proposes the tinplate production process of composite coating, and it comprises:

[0031] S09, entrance section: open the steel coil and process it to form strip steel, and use the strip steel as the steel matrix 1;

[0032] S10, pre-treatment: degreasing and pickling the steel substrate 1 to remove stains such as oil and rust on the surface of the steel substrate 1 .

[0033] S20, electroplating tin: electroplating tin on the steel substrate 1, and then rinsing to form a pure tin layer 3 on the surface of the steel substrate 1, wherein the amount of tin plating on one side of the electroplating tin is 0.15-1.0g / m 2 , much less than the general tin-plated steel sheet. Generally, for the specifications of electro-tinned thin steel sheets, the best amount of tin plating is the specification of E2.8, that is, the amount of tin plating on one side is set to 2.8g / m 2 ;Set at 1.0g / m for some special purpo...

Embodiment 2

[0040] Such as figure 2 As shown, the embodiment of the present application proposes the tinplate production process of composite coating, and it comprises:

[0041] S09, entrance section: open the steel coil and process it to form strip steel, and use the strip steel as the steel matrix 1;

[0042] S10, pretreatment: degreasing and pickling the steel substrate 1 .

[0043] S20, tinning electroplating: electroplating tin on the steel substrate 1, and then rinsing to form a pure tin layer 3 on the surface of the steel substrate 1, wherein the amount of tin plating on one side of the electroplating tin is 0.15-1.0g g / m 2 .

[0044] S21, remelting: heating the tin-plated steel substrate 1 to above 232°C to melt the tin coating layer on the surface of the steel substrate 1, so that the melted tin coating layer is leveled to produce a bright surface, and the steel substrate 1 and the pure tin layer 3 form a tin-iron alloy layer 2.

[0045]S30, two-step chromium electroplating:...

Embodiment 3

[0049] Such as image 3 As shown, the embodiment of the present application proposes the tinplate production process of composite coating, and it comprises:

[0050] S09, entrance section: open the steel coil and process it to form strip steel, and use the strip steel as the steel matrix 1;

[0051] S10, pretreatment: degreasing and pickling the steel substrate 1 .

[0052] S20, tinning electroplating: electroplating tin on the steel substrate 1, and then rinsing to form a pure tin layer 3 on the surface of the steel substrate 1, wherein the amount of tin plating on one side of the electroplating tin is 0.15-1.0g g / m 2 .

[0053] S30, one-step electroplating of chromium: electroplating chromium on the surface of the steel substrate 1 that has completed step S20 and rinsing to form a chromium metal layer 4 and a chromium hydrated oxide layer 5 on the surface of the pure tin layer 3, wherein the chromium electroplating step The concentration of the electroplating solution is ...

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Abstract

The invention relates to a tinplate production process for a composite coating and a tinplate. The tinplate production process comprises the following steps of step S10, pretreatment: degreasing and pickling a steel substrate; step S20, electroplating tin: electroplating tin on the steel substrate, and then rinsing to form a pure tin layer on the surface of the steel substrate; step S30, electroplating chromium: electroplating chromium on the surface of the steel substrate where step S20 has been completed, and rinsing to form a chromium metal layer and a chromium hydrated oxide layer on the surface of the pure tin layer; and step S40, oiling: oiling on the surface of the steel substrate where step S30 has been completed to form an oil film layer. According to the tinplate production process provided by the invention, the tinplate formed by using the process has the tin-plated and chromium-plated composite coating, based on the excellent corrosion resistance of metal chromium, the chromium-plated layer on the outer surface mainly plays a role of anti-corrosion, the tin in the inner layer has good welding performance, and acts as a soldering flux when welding is needed to ensure thewelding quality when making cans, so that chrome-plated iron can also be used to make three-piece cans, and the cost is reduced.

Description

【Technical field】 [0001] The present application relates to the technical field of tinplate, in particular to a tinplate production process of a composite coating and the tinplate. 【Background technique】 [0002] Tinplate products are common names in China for cold-rolled thin steel plate tinned products and cold-rolled thin steel plated chrome-plated products. These two products are similar in use. The main purpose is to be used as food packaging materials and made into cans, boxes, covers, etc. For food and beverage packaging, its non-toxicity, freshness, long-term and recyclability are the best metal packaging materials for food that humans have found so far. Generally, electro-tin-plated thin steel products are produced by stamping to produce two-piece cans, and by welding to produce three-piece cans. [0003] Compared with the electrochrome-plated thin steel plate of the same area, the tin-plated thin steel plate requires a thicker tin metal coating to meet the anti-co...

Claims

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Application Information

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IPC IPC(8): C25D5/12C25D5/36C25D5/48C25D7/06
CPCC25D5/12C25D5/36C25D5/48C25D7/0614
Inventor 朱大苏吴建槟王海东李章张宏
Owner ZHONGSHAN ZHONGYUE TINPLATE IND CO LTD
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