CN102242382A - Production method of silver-plated conductor for producing highly sophisticated products for aviation and aerospace - Google Patents

Abstract

The invention discloses a production method of a silver-plated conductor for producing highly sophisticated products for aviation and aerospace. The production method is characterized by comprising the following production steps: firstly preparing a nickel salt, then preparing a plating solution, insulating a copper or copper alloy conductor, chemically degreasing, washing with water, chemically derusting and polishing, washing with water, carrying out weak etching, washing with water twice, placing into the plating solution for nickel pre-plating, recovering, washing with water, removing the film, washing with water twice, carrying out silver pre-plating and silver plating, recovering, washing with water twice, passivating, washing with water, and drying to obtain the silver-plated conductor. The coating of the silver-plated conductor has the advantages of uniform thickness, high purity, good density, high corrosion resistance and everlasting luster and whiteness; and the silver-plated conductor can be used for highly sophisticated products in aviation, aerospace and other fields.

Description

A kind of production method of producing the used silver-plated conductor of the high highly sophisticated products of Aeronautics and Astronautics

Technical field

The present invention relates to a kind of production method of silver-plated conductor.

Background technology

Present the most widely used silver plating process remains the prussiate silver plating process.Because this technology has extensive applicability, silver-platedly can adopt from common, and coating performance is also relatively good to the high speed electroforming is silver-plated.In recent years also have some non-cyanide silver coating technologies to be used for industrial production, the non-cyanide silver coating technology in the research and development is just more, but also there is certain gap in the performance of the stability of these yuan cyanogen plating bath and coating and prussiate is silver-plated compares.Develop and to replace the important topic that the silver plated novel process of prussiate remains the electroplating technology field.

Summary of the invention

It is low that purpose of the present invention just provides a kind of cost, and performance is good, is suitable for the production method of the used silver-plated conductor of the high highly sophisticated products of Aeronautics and Astronautics.

The technical solution used in the present invention is: a kind of production method of producing the used silver-plated conductor of the high highly sophisticated products of Aeronautics and Astronautics is characterized in that it comprises following production stage:

(1) preparation nickel salt, the NiSO47H2O of SILVER REAGENT is made into the solution of 250～300g/L and is heated to 50～60 ℃, under condition of stirring, slowly add then and calculate good A liquid, just become clearly until solution, continue to stir 0.5h subsequently, leave standstill 24h again, adopt the mode Ex-all sulfate radical (with the check of BaCl2 solution) of vacuum filtration at last, do not contained SO ₄ ^2-Active nickel salt;

(2) the pre-silver-plated solution of preparation, KCN70-80g/L, KAg (CN) ₂, 5-7g/L, mixed pre-silver-plated solution; Prepare silver-plated nickelalloy solution, press solution quality than KAg (CN) ₂30-80g/L, KCN10-30g/L, K ₂CO ₃10-20g/L, CdSO ₄0.2-0.3g/L, asccharin 0.1-0.2g/L; Coordination agent 100-150g/L; Nickel salt 5-10g/L; Potassium selenite 1-2g/L prepares above-mentioned substance, at PH13-14; Temperature 20-40 degree centigrade is advanced to be prepared as follows solution, and at first the long-pending deionized water of splendid attire 1/2 cell body in coating bath adds desired other auxiliary material in the prescription, solution is heated to 70 ℃, and constantly stirs; Treat to dissolve fully the back and add the 1-1.5g/L gac, stir the 1h after-filtration; In filtrate, add deionized water, when being close to the regulation liquid level, constantly adding CdSO4, potassium selenite, asccharin and active nickel salt saturated solution under the condition of stirring;

(3) to copper or copper alloy conductor insulate → the silver-plated nickelalloy solution of electrochemical deoiling → washing → chemical rust removing bright dipping → washing → mild acid etching → washing 2 times → put into carries out nickel preplating → recovery → washing → membrane removal → washing 2 times → pre-silver-plated solution silver-plated in advance → put into silver-plated nickelalloy solution silver-plated → 2 times → passivation → washing → oven dry of recovery → washing, promptly make silver-plated conductor.

The invention has the beneficial effects as follows:

1. silver-coated copper wire all is to adopt low resistance high-quality copper cash, guarantees that product has excellent conducting performance.

2. thickness of coating is even, is complete concentric with copper cash.

3. coating purity height (argentiferous is more than 99.99%), compactness is good, and erosion resistance is strong, and the color and luster brilliant white is lasting.

4. coating and copper line surface are complete state, and performance is also very stable under high temperature, and resistance to deterioration is good.

5. weldability is good, can not use soldering flux during welding, can prevent that soldering flux from corroding product, omits anticorrosion formality, enhances productivity.

6. silvered film density is big, is difficult for oxidation desilverization powder, reduces the problem that desilverization powder is caused in the electric wire production process: silver powder stops up pilot hole and causes short-term midway; Silver powder reduces the insulation strength of electric wire.

Embodiment

A kind of production method of producing the used silver-plated conductor of the high highly sophisticated products of Aeronautics and Astronautics of the present invention is characterized in that it comprises following production stage:

(1) preparation nickel salt, the NiSO47H2O of SILVER REAGENT is made into the solution of 250～300g/L and is heated to 50～60 ℃, under condition of stirring, slowly add then and calculate good A liquid, just become clearly until solution, continue to stir 0.5h subsequently, leave standstill 24h again, adopt the mode Ex-all sulfate radical (with the check of BaCl2 solution) of vacuum filtration at last, can not contained SO ₄ ^2-Active nickel salt;

(2) the preparation plating bath prepares pre-silver-plated solution, KCN70-80g/L, KAg (CN) ₂, 5-7g/L, mixed pre-silver-plated solution; Prepare silver-plated nickelalloy, KAg (CN) ₂, 30-80g/L, KCN10-30g/L, K ₂CO ₃10-20g/L, CdSO ₄0.2-0.3g/L, asccharin 0.1-0.2g/L; Coordination agent 100-150g/L; Nickel salt 5-10g/L; Potassium selenite 1-2g/L, PH13-14; Temperature 20-40 degree centigrade;

(3) the long-pending deionized water of splendid attire 1/2 cell body in coating bath adds desired other auxiliary material in the prescription, solution is heated to 70 ℃, and constantly stirs.Treat to dissolve fully the back and add the 1-1.5g/L gac, stir the 1h after-filtration; In filtrate, add deionized water, when being close to the regulation liquid level, constantly adding CdSO4, potassium selenite, asccharin and active nickel salt saturated solution under the condition of stirring;

(4) to copper or copper alloy conductor insulate → electrochemical deoiling → washing → chemical rust removing bright dipping → washing → weak etch → washing 2 times → putting into plating bath carries out nickel preplating → recovery → washing → membrane removal → 2 times → silver-plated in advance → silver-plated → 2 times → passivation → washing → oven dry of recovery → washing of washing, promptly makes silver-plated conductor.

Claims (1)

1. production method of producing the used silver-plated conductor of the high highly sophisticated products of Aeronautics and Astronautics is characterized in that it comprises following production stage:

(1) preparation nickel salt, the NiSO47H2O of SILVER REAGENT is made into the solution of 250～300g/L and is heated to 50～60 ℃, under condition of stirring, slowly add then and calculate good A liquid, just become clearly until solution, continue to stir 0.5h subsequently, leave standstill 24h again, adopt the mode Ex-all sulfate radical (with the check of BaCl2 solution) of vacuum filtration at last, do not contained SO ₄ ^2-Active nickel salt;

(2) the pre-silver-plated solution of preparation, KCN70-80g/L, KAg (CN) ₂, 5-7g/L, mixed pre-silver-plated solution; Prepare silver-plated nickelalloy solution, press solution quality than KAg (CN) ₂30-80g/L, KCN10-30g/L, K ₂CO ₃10-20g/L, CdSO ₄0.2-0.3g/L, asccharin 0.1-0.2g/L; Coordination agent 100-150g/L; Nickel salt 5-10g/L; Potassium selenite 1-2g/L prepares above-mentioned substance, at PH13-14; Temperature 20-40 degree centigrade is advanced to be prepared as follows solution, and at first the long-pending deionized water of splendid attire 1/2 cell body in coating bath adds desired other auxiliary material in the prescription, solution is heated to 70 ℃, and constantly stirs; Treat to dissolve fully the back and add the 1-1.5g/L gac, stir the 1h after-filtration; In filtrate, add deionized water, when being close to the regulation liquid level, constantly adding CdSO4, potassium selenite, asccharin and active nickel salt saturated solution under the condition of stirring;

(3) to copper or copper alloy conductor insulate → the silver-plated nickelalloy solution of electrochemical deoiling → washing → chemical rust removing bright dipping → washing → mild acid etching → washing 2 times → put into carries out nickel preplating → recovery → washing → membrane removal → washing 2 times → pre-silver-plated solution silver-plated in advance → put into silver-plated nickelalloy solution silver-plated → 2 times → passivation → washing → oven dry of recovery → washing, promptly make silver-plated conductor.