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Chromium plating process of nuclear generator unit members

A technology for nuclear power units and components, which is applied in the field of chrome plating process for nuclear power unit components, can solve problems such as the inability to meet the new third-generation nuclear power technology, and achieve the effects of good compactness, good corrosion resistance, and uniform thickness

Active Publication Date: 2013-04-17
鹰普航空科技(南通)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing domestic electroplating process cannot meet the standards required by the new third-generation nuclear power technology in order to make the parts have good coating uniformity, strong bonding force, good compactness, and super wear resistance and corrosion resistance. Therefore, in order to solve To solve the above problems, a new technical solution is provided to meet the needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The chrome-plating process for nuclear power unit components of the present invention includes the following processing steps: a pre-plating surface treatment step, a chrome-plating treatment step and a post-plating surface treatment step,

[0018] The surface treatment steps before plating are:

[0019] a. Degreasing treatment: Put the parts into 100% acetone solution for cleaning for 10 minutes until they are clean, then rinse them with clean water to make them neutral, and then manually scrub them clean;

[0020] b. Tooling protection: According to the shape of the parts and the requirements of the coating part, select the corresponding tooling equipment and auxiliary anode equipment for installation, especially for the non-coating layer to be well protected and rinsed with clean water;

[0021] c. Acid activation treatment: put the parts obtained in the previous step into a tank filled with 5% sulfuric acid solution for activation for 1 minute, then rinse with water...

Embodiment 2

[0025] The chrome-plating process for nuclear power unit components of the present invention includes the following processing steps: a pre-plating surface treatment step, a chrome-plating treatment step and a post-plating surface treatment step,

[0026] The surface treatment steps before plating are:

[0027] a. Degreasing treatment: put the parts into 100% acetone solution and clean them for 15 minutes until they are clean, then rinse them with clean water to make them neutral, and then scrub them manually;

[0028] b. Tooling protection: According to the shape of the parts and the requirements of the coating part, select the corresponding tooling equipment and auxiliary anode equipment for installation, especially for the non-coating layer to be well protected and rinsed with clean water;

[0029] c. Acid activation treatment: Put the parts obtained in the previous step into a tank filled with 5% sulfuric acid solution for activation for 2 minutes, then rinse with water to...

Embodiment 3

[0033] The chrome-plating process for nuclear power unit components of the present invention includes the following processing steps: a pre-plating surface treatment step, a chrome-plating treatment step and a post-plating surface treatment step,

[0034] The surface treatment steps before plating are:

[0035] a. Degreasing treatment: put the parts into 100% acetone solution and clean them for 20 minutes until they are clean, then rinse them with clean water to make them neutral, and then scrub them manually;

[0036] b. Tooling protection: According to the shape of the parts and the requirements of the coating part, select the corresponding tooling equipment and auxiliary anode equipment for installation, especially for the non-coating layer to be well protected and rinsed with clean water;

[0037] c. Acid activation treatment: Put the parts obtained in the previous step into a tank filled with 5% sulfuric acid solution for activation for 2 minutes, then rinse with water to...

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Abstract

The invention discloses a chromium plating process of nuclear generator unit members, which is characterized by comprising a step of surface treatment before plating, a step of chromium plating treatment and a step of surface treatment after plating. The step of surface treatment before plating comprises the following steps: (a) oil removal treatment, (b) tool protection and (c) acid activation treatment. The step of chromium plating treatment comprises the following steps: putting the treated parts in a water bath of 50 DEG C to 60 DEG C for preheating for 3-10 min, heating a plating solution up to 50-60 DEG C, putting in plating parts, and chromium-plating for 25-30 min with multi-stage power supply under the conditions that the current density is 20-46 A / dm2 and the impact current density is 50-70 A / dm2. The step of surface treatment after plating comprises the following steps: washing with clear water and then rinsing with hot water (more than or equal to 80 DEG C) for 10-30 seconds, washing with pure water until neutral, dismounting the tools, washing with water and blow-drying. The process has the advantages that: the part coatings made by the chromium plating process are good in uniformity, bonding power and compactness.

Description

technical field [0001] The invention relates to a chromium plating process for nuclear power unit components. Background technique [0002] The new third-generation AP1000 nuclear power plant is the most advanced and safest nuclear power plant in the world today. Its parts not only have complex shapes and high technical requirements, but also require different coating thicknesses. However, the existing domestic electroplating process cannot meet the standards required by the new third-generation nuclear power technology in order to make the coating of the parts have good uniformity, strong bonding force, good compactness, and super wear resistance and corrosion resistance. To solve the above problems, a new technical solution is specially provided to meet the needs. Contents of the invention [0003] The object of the present invention is to provide a chromium plating process for nuclear power unit components. [0004] The technical scheme adopted in the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/06C25D5/02C25D5/18C25D5/34
Inventor 仇士学张建峰东永华
Owner 鹰普航空科技(南通)有限公司
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