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A production process of black chrome coating for high-performance heat collectors by continuous electroplating on metal strips

A technology of black chromium coating and production process, which is applied in the field of electroplating production process, can solve the problems of high current density, high production cost, poor conductivity of solution, etc., and achieve the effects of improved corrosion resistance, enhanced absorption, and uniform grain distribution

Inactive Publication Date: 2017-06-09
深圳市海达克新能源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electroplating black chromium process currently used has a high current density (15-200A / dm2), poor conductivity of the solution, and a large amount of Joule heat will be generated during electroplating, which requires cooling and ventilation to maintain normal production
In addition, when black chrome is plated on non-copper parts, it needs to be pre-plated with copper, then plated with bright nickel, and finally plated with black chrome, and the production cost is relatively high.

Method used

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  • A production process of black chrome coating for high-performance heat collectors by continuous electroplating on metal strips
  • A production process of black chrome coating for high-performance heat collectors by continuous electroplating on metal strips
  • A production process of black chrome coating for high-performance heat collectors by continuous electroplating on metal strips

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Embodiment 1

[0023] Embodiment 1: a kind of metal strip continuous electroplating high-performance heat collector black chrome coating production process, namely take metal plate and strip as base material, select aluminum plate strip as base material in the present embodiment, on it Continuous plating of black chrome coating, the specific process includes the following process procedures, followed by substrate pretreatment, quaternary alloy immersion zinc process, copper plating, nickel plating, chrome plating several process procedures;

[0024]The first is the material pretreatment process, the purpose of which is to remove impurities on the surface of the aluminum plate. The material pretreatment consists of four steps: alumina acid removal, water washing, alkali roughening agent, and water washing. The concentration of the aqueous solution is 12%, the operating temperature is 20°C, and the treatment time is 20°C. The degreasing agent can use the common electroplating degreasing agent i...

Embodiment 2

[0031] Embodiment 2: Embodiment 1: a kind of continuous electroplating high-performance heat collector black chromium coating production process for metal strips, promptly takes metal sheets and strips as the base material, and selects the copper plate strip as the base material in the present embodiment , on which the black chrome coating is continuously plated. The specific process includes the following process procedures, which are followed by substrate pretreatment, quaternary alloy zinc-immersion process, copper plating, nickel plating, and chrome plating;

[0032] The first is the material pretreatment process, the purpose of which is to remove impurities on the surface of the aluminum plate. The material pretreatment consists of four steps: alumina acid removal, water washing, alkali roughening agent, and water washing. Alumina acid removal uses a degreasing agent. Aluminum acid degreasing solution treatment, the concentration of the aqueous solution is 31%, the operati...

Embodiment 3

[0037] Embodiment 3: Embodiment 1: a kind of continuous electroplating high-performance heat collector black chromium coating production process for metal strips, that is, taking metal sheets and strips as base materials, selects stainless steel strips as base materials in the present embodiment The black chrome coating is continuously plated on it. The specific process includes the following process procedures, which are followed by substrate pretreatment, quaternary alloy immersion zinc process, copper plating, nickel plating, and chrome plating;

[0038] The first is the material pretreatment process, the purpose of which is to remove impurities on the surface of the aluminum plate. The material pretreatment consists of four steps: alumina acid removal, water washing, alkali roughening agent, and water washing. , the concentration of the aqueous solution is 19%, the operating temperature is 26°C, and the treatment time is 40s. The degreasing agent can use the common electrop...

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Abstract

The invention belongs to the field of solar heat absorbing coatings, and in particular relates to an electroplating production process for continuously plating black chrome coatings on aluminum strips. A production process for continuous electroplating of high-performance black chrome coatings on metal strips, that is, using metal plates and strips as substrates, and continuously plating black chrome coatings on them, characterized in that: the production The process includes the following process procedures, which are followed by substrate pretreatment, quaternary alloy zinc precipitation, copper plating, nickel plating, and chrome plating. The invention can provide a new black chromium continuous electroplating process, which is not only suitable for use in automatic continuous electroplating production lines, but also has excellent selective absorption performance and heat corrosion resistance of the plated black chromium coating.

Description

technical field [0001] The invention belongs to the field of solar heat absorbing coatings, and in particular relates to an electroplating production process for continuously plating black chrome coatings on aluminum strips. Background technique [0002] The black chromium plating layer has particularly excellent physical and chemical properties. It not only has a magnificent and solemn decorative appearance, but also is resistant to corrosion and high temperature. Even when the temperature rises to about 500 ° C, the black chromium plating layer can also maintain no discoloration and no brittleness. Good thermal stability. Therefore, the black chromium coating is more distinctive than other coatings such as electroplating black nickel, galvanized passivation, anodized black, etc., and is widely used as a protective decorative coating to reduce the reflection coefficient or as a functional coating with special requirements. , instrumentation, aerospace and other fields have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/08
Inventor 马清陈金岩
Owner 深圳市海达克新能源材料有限公司
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