Aluminum alloy tin electroplating treating method

A treatment method, electro-tinning technology, which is applied in the field of aluminum alloy processing, can solve the problems of serious oxidation and burning of alloys, achieve the effects of changing crystal appearance, enhancing the effect of degreasing, and preventing surface scratches

Inactive Publication Date: 2018-04-20
HENGQIN INT INTPROP EXCHANGE CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of surface alloying, the oxidation and burning of the alloy is serious, and a single spraying or electrochemical treatment cannot meet the requirements of corrosion resistance and wear resistance of aluminum alloy materials in some special fields. Therefore, it is necessary to develop and screen a new type of aluminum alloy processing technology. especially important

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  • Aluminum alloy tin electroplating treating method

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Effect test

Embodiment 1

[0024] The aluminum alloy semi-finished product was first degreased by alkaline treatment at 38°C for 12 minutes, then washed with absolute ethanol for 3 minutes, and then washed twice with distilled water for 3 minutes each time, and then put the cleaned aluminum alloy in 38g / Treat in 1 L of NaOH solution for 4min, then wash with distilled water at 35°C, then wash with cold water, and finally wash with a small amount of ordinary sulfuric acid to obtain a pretreated aluminum alloy semi-finished product; the degreasing solution in the degreasing treatment is 18% Na 2 CO 3 and 4% coconut acid diethanolamide dissolved in 78% water;

[0025] Then, the pretreated aluminum alloy semi-finished product is subjected to tinning treatment for 6 minutes. The treatment temperature is 45°C within the first 3 minutes of starting electroplating, and the treatment temperature within the next 3 minutes is 55°C. Among them, the electroplating tin solution: SnSO 4 35%, sodium imidazoline dicarb...

Embodiment 2

[0028] Alkaline degreasing treatment of aluminum alloy semi-finished products at 36°C for 14 minutes, followed by washing with absolute ethanol for 3 minutes, and then washing with distilled water for 3 times, each time for 3 minutes, and then putting the cleaned aluminum alloy into 37g / Treat in 1 L of NaOH solution for 4 minutes, then wash with distilled water at 32°C, then wash with cold water, and finally wash with a small amount of ordinary sulfuric acid to obtain a pretreated aluminum alloy semi-finished product; the composition of the degreasing solution is: Na 2 CO 3 16.5%, Diethanolamide Cocoate 4.5%, Water 79%;

[0029]Then, the pretreated aluminum alloy semi-finished product is electroplated for 9 minutes, and the treatment temperature is 42°C within the first 4 minutes of electroplating, and the treatment temperature within the next 4 minutes is 52°C; among them, the composition of the tin plating solution is: SnSO 4 30%, sodium imidazoline dicarboxylate 18%, 1,...

Embodiment 3

[0032] Alkaline degreasing treatment of aluminum alloy semi-finished products at 38°C for 12 minutes, followed by washing with absolute ethanol for 4 minutes, and then washing with distilled water for 3 times, each time for 4 minutes, and then putting the cleaned aluminum alloy into 36g / Treat in 1 L of NaOH solution for 3.5min, then wash with distilled water at 38°C, then wash with cold water, and finally wash with a small amount of ordinary sulfuric acid to obtain a pretreated aluminum alloy semi-finished product; the composition of the degreasing solution is: Na 2 CO 3 19%, Coco Diethanolamide 3.5%, Water 77.5%;

[0033] Then, the pretreated aluminum alloy semi-finished product is electroplated for 4 minutes. The treatment temperature is 48°C within the first 2 minutes of electroplating, and the treatment temperature within the next 2 minutes is 58°C; among them, the electroplating tin solution: SnSO 4 32%, sodium imidazoline dicarboxylate 16%, 1,10-phenanthroline 18%, s...

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Abstract

The invention relates to an aluminum alloy tin electroplating treating method, and belongs to the technical field of aluminum alloy machining. The aluminum alloy tin electroplating treating method comprises the following steps that an aluminum alloy semi-finished product is pretreated, tin electroplating treatment is carried out under the temperature of 40-60 DEG C for 2-10 min, and finally sealing treatment is carried out. Electroplating tin liquid adopted during tin electroplating treatment comprises 20-40% of SnSO4, 3-20% of imidazoline dicarboxylic acid sodium, 5-20% of 10-phenanthroline,3-10% of sodium gluconate, 3-10% of sodium citrate and 0.5-3% of carbon granules. Degreasing fluid with the reasonable compatibility is adopted for carrying out alkaline degreasing and other pretreatments on the aluminum alloy semi-finished product at first, then, the electroplating liquid with the reasonable compatibility is adopted for tin electroplating, and finally sealing liquid with the reasonable compatibility is adopted for carrying out sealing treatment. By means of multiple protection, the wear resistance and corrosion resistance of aluminum alloy are further improved.

Description

technical field [0001] The invention relates to a treatment method for aluminum alloy tin plating, which belongs to the technical field of aluminum alloy processing. Background technique [0002] Aluminum alloy has low density, high specific strength and specific stiffness, good plasticity, can be processed into various profiles, has excellent electrical conductivity, thermal conductivity, corrosion resistance, impact resistance and quite high recycling rate and regeneration rate A series of excellent characteristics, so it has received widespread attention. At present, aluminum alloys are widely used in all walks of life, such as manufacturing parts of aerospace vehicles that require high compressive yield strength, ships, automobiles, aircraft, cryogenic equipment, TV towers, drilling devices, transportation equipment, missile parts and decks Where high corrosion resistance, good weldability and medium strength are required, it is used to manufacture aircraft fuel tanks b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/32C25D15/00C25D5/48C25D5/44
CPCC25D3/32C25D5/44C25D5/48C25D15/00
Inventor 张秋月张小千
Owner HENGQIN INT INTPROP EXCHANGE CENT CO LTD
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