Preparation method for copper and copper alloy surface corrosion-resistant nano-film
A nano-film and copper alloy technology, applied in the direction of nano-technology, electrolytic organic material coating, etc., can solve the problem of not being able to completely isolate the penetration of water molecules, and achieve the effect of not easy to oxidize and decompose, controllable conditions, and environment-friendly
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Embodiment 1
[0032] Example 1: Preparation of copper-based surface corrosion-resistant nanofilm
[0033] Material preparation: pure copper (Shanghai Hongxin Metal Materials Co., Ltd., the purity is greater than 99.95%), copper sheets with a specification of 50mm×20mm×0.3mm, and the copper sheets are sequentially sprayed with 2.5μm, 1.5μm and 0.5μm diamond polishing agent Polished and polished to a mirror surface, then immersed in acetone for ultrasonic cleaning for 15 minutes to degrease and remove other organic contaminants, rinsed with deionized water and absolute ethanol in sequence, and then blown dry with nitrogen.
[0034] 6-N,N-Diallylamine-1,3,5-triazine-2,4-thiol monosalt (DAN)
[0035] Specific preparation process:
[0036] (1) Electrodeposition coating: the test temperature is room temperature, and the plating solution is composed of 6-N,N-diallylamine-1,3,5-triazine-2,4-thiol monosalt (DAN) and Sodium carbonate was used as the supporting electrolyte mixed solution, in which t...
Embodiment 2
[0040] The sample prepared in Example 1 was immersed in a corrosive medium to detect its relevant properties, and the electrochemical parameter measurements were all carried out on Wuhan Koster CS310 electrochemical workstation. The experiment used a standard three-electrode electrolytic cell, including working electrodes (copper ), the counter electrode (graphite electrode, the specification is 50mm×30mm×3mm) and the reference electrode (saturated calomel electrode SCE). The reference electrode was connected to the electrolytic cell with a Lukin capillary salt bridge, all measured potentials were relative to that of a saturated calomel electrode (SCE), and the corrosion medium was a 3.5 wt% NaCl solution (simulated seawater).
[0041] Before the test, wrap the sample with polyimide tape so that the exposed area is 1cm 2 The working electrode is firstly soaked in the corrosive medium for about 0.5h, and then the open circuit potential (OCP) change of the system is measured. Wh...
Embodiment 3
[0053] On the basis of Example 2, in order to further explore the anti-corrosion effect of electrodeposited film combined with adsorption on copper, the electrochemical impedance spectra of copper samples modified by different methods in 3.5% NaCl solution were measured. The results are as follows figure 2 As shown in the figure, the electrochemical impedance Nyquist spectra of pure copper samples in sodium chloride solution, electrodeposition coating, DAN adsorption and electrodeposition coating combined with DAN adsorption treatment in sodium chloride solution, respectively, are shown in the figure. Bode and phase angle maps, Z' and Z" in the figure are the real and imaginary parts of the copper electrode surface impedance value, respectively, and |Z| is the total impedance.
[0054] from figure 2 As can be seen in a, all curves present an irregular compressed semicircular capacitive reactance arc at the high frequency end. The compression deformation of the high frequency...
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