Deep hole chemical nickel plating process

A deep hole chemical and nickel plating technology, which is applied in the direction of liquid chemical plating, metal material coating process, superimposed layer plating, etc., can solve the problems of reducing chemical plating, limited amount of plating solution, and poor quality of nickel plating, etc. To achieve the effect of improving the bonding strength and improving the quality of nickel plating

Pending Publication Date: 2021-06-04
西安德宇机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that there are the following defects: when nickel-plating a plated part with a deep hole, due to the small size of the deep hole cavity and the long inner hole, the amount of plating solution in the deep hole is limited, or There are cavities in the interior. With the consumption of nickel ions in the plating solution during the nickel plating process, the effect of electroless plating is reduced, making the plating layer in the deep hole thinner or missing plating, resulting in poor nickel plating quality.

Method used

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  • Deep hole chemical nickel plating process

Examples

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Effect test

Embodiment 1

[0033] Embodiment 1: a kind of deep hole electroless nickel plating process, comprises the steps:

[0034] 1) Plated parts treatment: Grinding the surface of the plated parts and the deep holes of the plated parts with a grinder to remove the scale;

[0035] 2) Chemical degreasing: soak the plated parts in 50g / L chemical degreasing powder solution for steel parts for degreasing, the temperature is 65°C, the time is 120min, then rinse with tap water at room temperature for 2min, and finally scrub with tap water 3min;

[0036] 3) Pickling: soak the plated parts in a mixed solution of 300ml / L hydrochloric acid and 3g / L hexamethylenetetramine at room temperature for 5 minutes, then rinse with tap water for 2 minutes, and then soak in 8% sulfuric acid for 2 minutes , and then rinsed with tap water for 2 minutes;

[0037] 4) Pre-plating impact nickel: Electroplating in 130ml / L hydrochloric acid and 200g / L nickel chloride solution for 5±1min with a voltage of 7V, then rinse with ta...

Embodiment 2

[0049] Embodiment 2: a kind of deep hole electroless nickel plating process, differs from embodiment 1 in that, comprises the steps:

[0050] 1) Plated parts treatment: Grinding the surface of the plated parts and the deep holes of the plated parts with a grinder to remove the scale;

[0051] 2) Chemical degreasing: Soak the plated parts in 55g / L steel chemical degreasing powder solution for degreasing, the temperature is 68°C, the time is 130min, then rinse with tap water at room temperature for 2.5min, and finally pass through tap water Scrub for 2.5 minutes;

[0052] 3) Pickling: Soak the plated piece in a mixed solution of 330ml / L hydrochloric acid and 4g / L hexamethylenetetramine at room temperature for 8 minutes, then rinse it with tap water for 3 minutes, and then soak it in 10% sulfuric acid for 2.5 minutes. min, and then rinsed with tap water for 2.5 min;

[0053] 4) Pre-plating impact nickel: electroplating in 140ml / L hydrochloric acid and 210g / L nickel chloride sol...

Embodiment 3

[0055] Embodiment 3: a kind of deep hole electroless nickel plating process, differs from embodiment 1 in that, comprises the steps:

[0056] 1) Plated parts treatment: Grinding the surface of the plated parts and the deep holes of the plated parts with a grinder to remove the scale;

[0057] 2) Chemical degreasing: Soak the plated parts in 60g / L steel chemical degreasing powder solution for degreasing, the temperature is 70°C, the time is 150min, then rinse with tap water at room temperature for 3min, and finally scrub with tap water 3min;

[0058] 3) Pickling: soak the plated parts in a mixed solution of 350ml / L hydrochloric acid and 5g / L hexamethylenetetramine at room temperature for 10 minutes, then rinse with tap water for 3 minutes, and then soak in 9% sulfuric acid for 3 minutes , and then rinsed with tap water for 3 minutes;

[0059] 4) Pre-plating impact nickel: electroplating in 150ml / L hydrochloric acid and 220g / L nickel chloride solution for 5 minutes, with a vol...

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Abstract

The invention relates to a deep hole chemical nickel plating process. The deep hole chemical nickel plating process comprises the following steps: (1) surface treatment of a plated part, (2) chemical oil removal, (3) rust removal of the plated part through acid pickling, and (4) chemical nickel plating of the plated part: the plated part is put into a plating solution so as to be soaked for nickel plating, in the nickel plating process, a slender pipe firstly extends into a deep hole of the plated part, then the plating solution is injected into the deep hole through a pump, the plating solution in the deep hole continuously and circularly flows, the flow direction of the plating solution in the deep hole is changed once every 10 to 20 min, washing is conducted through cold water after continuous nickel plating is completed, scalding washing is conducted through hot water, and finally drying is conducted. The deep hole chemical nickel plating process provided by the invention has the effect of improving the nickel plating quality in the deep hole.

Description

technical field [0001] The present application relates to the technical field of nickel plating, in particular to a deep hole electroless nickel plating process. Background technique [0002] The method of depositing a layer of nickel on metal or some non-metal is called nickel plating. Nickel plating is divided into electroplating nickel plating and chemical nickel plating. Nickel electroplating is in the electrolyte composed of nickel salt, conductive salt, pH buffer and wetting agent. The anode uses metallic nickel, and the cathode is the plated part. Direct current is applied to deposit a uniform layer on the cathode (plated part). , Dense nickel coating. Electroless nickel plating, also known as electroless nickel plating, or self-catalytic nickel plating, refers to the process in which nickel ions in aqueous solution are reduced by a reducing agent and precipitate onto the surface of a solid substrate under certain conditions. [0003] Nickel plating is usually carr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/32C23C18/18C23C28/02C25D3/12
CPCC23C18/32C23C18/1806C23C18/1844C25D3/12C23C28/023C23C18/1617
Inventor 惠永利杨帅
Owner 西安德宇机械科技有限公司
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