Hydrophobicity conductive tool coated with chromium carbide base metal ceramic electroplated layer and method for manufacturing same

Abstract

The present invention relates to a hydrophobicity conductive tool coated with a chromium carbide base metal ceramic electroplated layer and a method for manufacturing same. The hydrophobicity conductive tool is characterized in that the chromium carbide base metal ceramic electroplated layer is electroplated on teh surface of the tool, has an electrical conductivity that the specific resistance is less than 100 Ohms, a hydrophobicity that the water contact angle is greater than 94 degrees and a performance that a linear polarization corrosion current is less than 1*10-5 amperes, can be applied to the tool of high precision and rigidity, wear resistance, hydrophobicity and good electrical conductivity, such as medical scalpel, battery polar plate, joint, pin, etc. The present invention also provides a trivalent chromium electroplating method for manufacturing the hydrophobicity conductive tool.

Description

technical field [0001] The invention relates to the field of modification and application of hydrophobic conductive tools, in particular to a hydrophobic conductive tool coated with a chromium carbide-based cermet electroplating layer and a manufacturing method thereof, in which the chromium carbide-based cermet is coated with a trivalent chromium electroplating method The surface of the tool is used for hydrophobic conductive tools, such as medical electric scalpels, battery plates or connector pins, etc. Background technique [0002] Chromium carbide-based cermet compound (chromium carbide ceramic or chromium-carbon) has excellent mechanical strength and chemical stability, and it has the characteristics of high hardness, high melting point, and strong corrosion resistance, as disclosed in Japanese patent JP2010248595 on the substrate A layer of 45-55wt.% chromium carbide and 30-40wt.% cobalt (Co) can still have good wear resistance under the use condition of 1000°C; Japan...

AI Technical Summary

Problems solved by technology

Yet the electrocautery scalpel 95 of conventional technology is often covered with Teflon (polytetrafluoroethylene, Polytetrafluoroetylene), fluorine-containing hydrocarbon (fluorinated hydrocarbons) or chromium nitride film (CrN, CrN) on the surface. 2 N), etc., among them, Teflon has the problem of releasing toxic gases containing fluorine, and the general chromium nitride film is mainly CrN, but the surface contact angle of CrN is 78°, which is hydrophilic, and it is easy to stick when cutting tissue. ; and Cr 2 The N film is closer to hydrophobicity, and its surface contact angle is about 101°, but the Cr 2 N thin film is not easy to produce

Due to the poor conductivity of Teflon and chromium nitride films, there are restrictions on the use of electrocautery scalpels

U.S. Patent No. 5,801,110 discloses the use of dry plasma spraying (plasma spraying) to spray chromium carbide ceramics on dental and surgical instruments to increase gripping ability and wear resistance, but still The production method of chromium carbide ceramics for spraying is quite expensive, the yield is low, and the surface density is not enough, the conductivity and hydrophobicity are not good, so there are restrictions on its use

[0008] In terms of the application of contact electrode material, for example, Taiwan patent TWI372484 discloses a fuel cell bipolar plate using a trivalent chromium passivation film. However, although the passivation film can make the fuel cell bipolar plate have conductivity, the Insufficient passivation film density and poor corrosion resistance; due to the conductive and corrosion-resistant properties of chromium carbide materials, for example, the early European patent EPO0227973 used vacuum interrupter to infiltrate 250 μm chromium carbide materials into porous substrates China is used in electrodes; U.S. published patent US20070117003 uses electron beam evaporation (electron beam evaporation) to attach carbides to stainless steel plates to make conductive, stable and hydrophobic electrodes for use in fuel cell bipolar plates ; but the equipment of these dry manufacturing methods is expensive, needs to be heated, and the base material will be deformed by high temperature and other inconveniences

In 2011, the abstract of the published paper "Research on Trivalent Chromium Electroplating on Metal Bipolar Plates of Fuel Cells" by Shen Shiyu disclosed the use of trivalent chromium electroplating methods, and in 2011 "Electroplating Chromium-Carbon Alloys on Fuel Cells" by Xie Yuxuan. The abstract of the paper published in "Research on the Mechanism of Battery Bipolar Plates" also discloses the use of trivalent chromium electroplating method to plate a layer of chromium-carbon coating on the surface of metal materials to increase the corrosion resistance of battery bipolar plates, but for the bipolar plates Hydrophobic properties remain unresolved

[0009] Due to the high-temperature preparation process used in the production of hydrophobic conductive tools by the dry method, in addition to the high temperature easily causing tempering and destroying the hardness of the tool itself, the production cost of the dry method is high, and it is impossible to make a conductive layer with high carbon content and high hydrophobicity. The Cr-C layer has low density and the tool substrate is easy to dissolve, resulting in disadvantages such as poor biocompatibility

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