Test reagent for realizing online rapid nondestructive test of quality of gold plating layer and using method of test reagent

A non-destructive testing and coating technology, which is applied in the direction of chemical reaction of materials and material analysis by observing the influence of chemical indicators, which can solve the problem of inability to realize online non-destructive testing, cumbersome operation of testing technology, and long test time. and other problems, to achieve the effects of high test efficiency, strong wetting penetration, and simple use methods

Active Publication Date: 2014-03-19
TANTZ ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] In order to solve the problems of the existing coating defect detection technology, such as cumbersome operation, long test time, inability to realize online non-destructive testing, need for special instruments, toxic reagents, etc., the primary purpose of the present invention is to provide an online rapid non-destructive testing method for the quality of gold coatings. test reagent

Method used

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  • Test reagent for realizing online rapid nondestructive test of quality of gold plating layer and using method of test reagent
  • Test reagent for realizing online rapid nondestructive test of quality of gold plating layer and using method of test reagent
  • Test reagent for realizing online rapid nondestructive test of quality of gold plating layer and using method of test reagent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Test reagent components (percentage by weight): 3% trifluoroacetic acid, 10% copper sulfate pentahydrate, and the balance is pure water.

[0048] Conventional acid control components ① (percentage by weight): 3% hydrochloric acid, 10% copper sulfate pentahydrate, and the balance is pure water.

[0049] Conventional acid control component ② (percentage by weight): 3% hydrochloric acid, 3% trifluoroacetic acid, 10% copper sulfate pentahydrate, and the balance is pure water.

[0050] Test sample: PCB mobile phone antenna board, nickel layer thickness 1-2μm, gold thickness 0.025-0.075μm.

[0051] The processing group settings are as follows:

[0052] 1#: The treatment group of the present invention. Apply 2 to 3 drops of the present invention to cover the area to be detected of the gold coating, wipe the gold coating with a dust-free cloth after several seconds, and observe the discoloration.

[0053] 2#: Salt spray treatment group. Operate according to GB / T10125-1997 s...

Embodiment 2

[0062] Test reagent components (percentage by weight): 1% trifluoroacetic acid, 8% copper sulfate pentahydrate, 2% silver nitrate, and the balance is pure water.

[0063] Conventional acid control components ① (percentage by weight): 1% nitric acid, 8% copper sulfate pentahydrate, 2% silver nitrate, and the balance is pure water.

[0064] Conventional acid control component ② (percentage by weight): 1% nitric acid, 1% trifluoroacetic acid, 8% copper sulfate pentahydrate, 2% silver nitrate, and the balance is pure water.

[0065] Test sample: PCB mobile phone battery board, nickel layer thickness 3-5μm, gold thickness 0.075-0.125μm.

[0066] The processing group settings are as follows:

[0067] 1#: The treatment group of the present invention. Apply 2 to 3 drops of the present invention to cover the area to be detected of the gold coating, wipe the gold coating with a dust-free cloth after several seconds, and observe the discoloration.

[0068] 2#: Salt spray treatment gro...

Embodiment 3

[0077]Test reagent components (percentage by weight): 1% trifluoroacetic acid, 3% copper sulfate pentahydrate, 0.1% silver nitrate, 0.02% EH-6 (Dow, USA), and the balance is pure water.

[0078] Conventional acid control components ① (percentage by weight): 1% sulfuric acid, 3% copper sulfate pentahydrate, 0.1% silver nitrate, 0.02% EH-6 (U.S. Dow), and the balance is pure water.

[0079] Conventional acid control component ② (percentage by weight): 1% sulfuric acid, 1% trifluoroacetic acid, 3% copper sulfate pentahydrate, 0.1% silver nitrate, 0.02% EH-6 (Dow, USA), and The amount is pure water.

[0080] Test sample: PCB optical mode communication board, nickel layer thickness 5-8μm, gold thickness 0.75-1μm.

[0081] The processing group settings are as follows:

[0082] 1#: The treatment group of the present invention. Apply 2 to 3 drops of the present invention to cover the area to be detected of the gold coating, wipe the gold coating with a dust-free cloth after several...

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Abstract

The invention discloses a test reagent for realizing the online rapid nondestructive test of the quality of a gold plating layer and a using method of the test reagent. The reagent contains trifluoroacetic acid and copper sulfate pentahydrate. The using method comprises the following steps: dropwise adding 2-3 drops of test reagent in a to-be-detected region of the gold plating layer, wiping the gold plating layer by using dust-free cloth after 60-120s, and observing the color change condition of the gold plating layer; if the color of the gold plating layer is changed, judging that a workpiece is a defective product; if the color of the gold plating layer is unchanged, judging that the plating layer is qualified. The test reagent disclosed by the invention is rapid in reaction, an obvious color difference exists between a generated corrosion product and the plating layer, and a result is high in accuracy and easy to judge; the test reagent is extremely simple in operation, no special instruments are needed, and online detection can be realized; the test reagent can be used for realizing nondestructive test, and workpieces which are qualified through test can be continued to be processed, assembled and circulated on a production line, so that the resource is saved; the test reagent is low in cost but capable of accurately reminding a manufacturer of stopping the subsequent processing of a defective product of the plating layer and taking remediation measures in time, so that more loss is avoided.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to on-line rapid non-destructive testing of the quality of gold coatings of electrical and electronic products, in particular to a test reagent for on-line rapid non-destructive testing of the quality of gold coatings and a method of use. Background technique [0002] Copper has excellent strength, machinability, thermal conductivity, electrical conductivity, weldability, etc., and has been widely used in various fields such as industry, military and civilian use for a long time. For example, copper is one of the indispensable and important metal materials in the electronics, communication and electrical industries. However, copper is easily oxidized when exposed to the natural environment and generates insulating corrosion products, so it must be protected. [0003] Gold has stable chemical properties and can effectively resist harmful substances in the atmosphere (such as H 2 S,...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 吴小明路勇刘宏吴银丰刘倩源
Owner TANTZ ENVIRONMENTAL TECH
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