Copper-based material pickling liquor with corrosion inhibition effect

A base material acid and corrosion inhibition technology, which is applied in the field of pickling liquid for copper base materials, can solve the problems of high cost, low corrosion inhibition efficiency of corrosion inhibitors, poor biodegradability, etc., and achieves strong applicability, cheap raw materials, and Easy to get effect

Inactive Publication Date: 2013-11-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to achieve the above object, the technical solution of the present invention aims at the defects of low corrosion inhibition efficiency, high cost and poor biodegradability of the corrosion inhibitor in the copper substrate pickling solution in the background technology,

Method used

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  • Copper-based material pickling liquor with corrosion inhibition effect
  • Copper-based material pickling liquor with corrosion inhibition effect
  • Copper-based material pickling liquor with corrosion inhibition effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The acid solution in the pickling solution is dilute nitric acid, the concentration is 0.5mol / L, the amount of pickling solution is 1L, add 2-(4-chlorophenyl)-3-cyclopropyl-1-(1H-1,2, 4-triazol-1-yl)butan-2-ol 10 -3 mol / L, under the condition of 25°C, immerse the metal copper to be cleaned in the pickling solution for 10 days in the weight loss test; soak for 1 hour in the electrochemical test.

[0021] The highest corrosion inhibition efficiency obtained through the weight loss test is 88.7%, the electrochemical impedance spectroscopy test results show that the corrosion inhibition efficiency is 98.7%, the potentiodynamic polarization curve test results show that the corrosion inhibition efficiency is 99.7%, and the corrosion inhibition efficiency in the pickling treatment solution shown to be effective corrosion inhibitors.

Embodiment 2

[0023] The acid solution in the pickling solution is dilute nitric acid and dilute sulfuric acid, the concentration is 0.5mol / L respectively, the amount of pickling solution is 100L, add 2-(4-chlorophenyl)-3-cyclopropyl-1-(1H- The amount of 1,2,4-triazol-1-yl)butan-2-ol is 10 -3 mol / L, immerse the copper clad laminate to be cleaned in the pickling solution for 15 days at 25°C.

[0024] The highest corrosion inhibition efficiency obtained by the weight loss test is 90%, and the corrosion inhibitor in the pickling treatment solution is shown to be an efficient corrosion inhibitor.

Embodiment 3

[0026] The acid liquid in the pickling liquid is dilute sulfuric acid, the concentration is 0.5mol / L, the amount of pickling liquid is 10L, add 2-(4-chlorophenyl)-3-cyclopropyl-1-(1H-1,2, The amount of 4-triazol-1-yl)butan-2-ol is 10 -3 mol / L, immerse the metal copper to be cleaned in the pickling solution for 20 days in the weight loss test at 15°C; soak for 2 hours in the electrochemical test.

[0027] The highest corrosion inhibition efficiency obtained by weight loss test is 82.1%, the electrochemical impedance spectroscopy test results show that the corrosion inhibition efficiency is 93.7%, the potentiodynamic polarization curve test results show that the corrosion inhibition efficiency is 84.1%, and the corrosion inhibition efficiency in the pickling treatment solution shown to be effective corrosion inhibitors.

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Abstract

The invention belongs to a copper-based material pickling liquor with corrosion inhibition effect, and relates to a pickling/microetching treatment process before electrocoppering in manufacture of printed circuit boards, and specifically the copper-based material pickling liquor with corrosion inhibition effect is used to prevent over etching of acidic mediums to copper of a printed circuit board or a printed circuit board product during pickling/microetching. Aiming at the disadvantages of high cost, low corrosion inhibition efficiency, bad biodegradability and the like of a corrosion inhibitor in a conventional copper-based material pickling liquor, 2-(4-chlorophenyl)-3-cyclopropyl-2-(1H-1, 2, 4-triazol-1-yl)butan-1-ol usually as a plant bactericide is employed as a corrosion inhibitor, and is added to an acid liquor for preparation of the copper-based material pickling liquor with corrosion inhibition effect. Cyproconazole as the corrosion inhibitor in the pickling liquor is low in usage amount, low in cost, easy to obtain, naturally degradable in the sun, none in environmental problems after used, and accord with development trend of green corrosion inhibitors; and the pickling liquor has high corrosion inhibition efficiency of up to 80-99% and stable corrosion inhibition performance.

Description

technical field [0001] The invention belongs to a copper substrate pickling solution with corrosion inhibiting effect, and relates to the pickling / micro-etching treatment process before electroplating copper in the manufacture of printed circuit boards, specifically to prevent copper and corrosion on the surface of printed circuit boards. It is a pickling solution for copper substrates with corrosion inhibition effect for over-corrosion of metal copper by acid medium in the process of pickling / micro-etching. Background technique [0002] Metal copper is the most widely used and used in the electrical and electronic industries, accounting for more than half of the total consumption. Used in the manufacture of various printed circuit boards, motors, transformers, switches, cables and wires, printed circuit boards are an important electronic material, it is the support of electronic components, and the main carrier for the electrical connection of electronic components . The ...

Claims

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Application Information

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IPC IPC(8): C23G1/06C23G1/10
Inventor 陶志华何为王守绪郑莉王韬
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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