Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing anti-fouling ceramic film electrolyte on titanium alloy surface and micro-arc oxidation

A technology of micro-arc oxidation and electrolyte, which is applied in the micro-arc oxidation method to prepare the electrolyte of the wear-resistant, corrosion-resistant and anti-biofouling ceramic film on the surface of titanium alloy. , Fouling and bio-corrosion, etc., to prevent material corrosion damage or pipeline blockage, reduce energy consumption, reduce seawater resistance and friction

Inactive Publication Date: 2016-04-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the problems that titanium alloys are prone to contact corrosion with heterogeneous metals, easy to wear, and prone to marine biofouling and biocorrosion in the harsh service environment of the ocean, and to provide a micro-arc oxidation method. Electrolyte for preparing wear-resistant, corrosion-resistant, anti-biofouling and anti-biofouling ceramic film on titanium alloy surface and specific micro-arc oxidation operation method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing anti-fouling ceramic film electrolyte on titanium alloy surface and micro-arc oxidation
  • A method for preparing anti-fouling ceramic film electrolyte on titanium alloy surface and micro-arc oxidation
  • A method for preparing anti-fouling ceramic film electrolyte on titanium alloy surface and micro-arc oxidation

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0029] Specific Example 1: (1) The surface of the Ti6Al4V alloy sample was polished with silicon carbide sandpaper, and the sandpaper was 320#, 600#, 800#, 1200# and 1500# in order from coarse to fine. Then use acetone solution to clean and degrease the surface of the sample in an ultrasonic cleaner for 15 minutes, rinse it with deionized water, and dry it with a hair dryer. (2) Weigh a certain amount of medicine into the electrolytic cell, add a small amount of deionized water and stir to dissolve the medicine, and then add deionized water until the electrolyte is diluted to the specified concentration. According to the ratio of mass to total volume, the concentrations of chemicals are: sodium aluminate 10g / L, sodium fluoride 5g / L, potassium hydroxide 5g / L, copper sulfate pentahydrate 0.5-2.5g / L, dihydrate ethylenediamine Sodium tetraacetate 0-3g / L, ammonia water 0-50ml / L. (3) Connect the titanium alloy sample to the anode of the power supply and immerse it in the electrolyt...

specific Embodiment 2

[0030] Specific embodiment two: what this embodiment differs from specific embodiment one is that the concentration of copper sulfate pentahydrate is 0.75-1.75g / L in the step (2), and the concentration of sodium edetate dihydrate is 1-2.33g / L, the concentration of ammonia water is 0. Others are the same as in the first embodiment.

specific Embodiment 3

[0031] Specific embodiment three: what this embodiment is different from specific embodiment one is that the concentration of copper sulfate pentahydrate is 0.5g / L in the step (2), and the concentration of sodium edetate dihydrate is 0.67g / L, ammoniacal liquor The concentration is 0. Others are the same as in the first embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
microhardnessaaaaaaaaaa
microhardnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to preparation of antifouling ceramic membrane electrolyte for a titanium alloy surface and a micro-arc oxidation method and belongs to the field of metal material surface modification. The electrolyte contains sodium aluminate, sodium fluoride, potassium hydroxide, copper sulfate and a complexing agent. The preparation comprises the following operation steps of: (1) polishing the surface of a titanium alloy sample by polishing and carrying out oil removing; (2) preparing electrolyte, setting micro-arc oxidation technological parameters, connecting the sample with an anode and dipping the sample and the anode into the electrolyte together, and adopting a stainless steel electrolytic tank containing the electrolyte as a cathode; (3) switching on an alternating current pulse power supply to perform micro-arc oxidation treatment; and (4) washing the sample subjected to micro-arc oxidation treatment by deionized water, and then naturally drying. A titanium alloy surface ceramic membrane prepared by the method has the advantages that the microhardness is up to 900HV at most, the abrasive resistance of the titanium alloy surface ceramic membrane is about 3 times that of a titanium alloy substrate, the resistance to electrochemical corrosion of the titanium alloy surface ceramic membrane is superior to that of the titanium alloy substrate, and no marine organism is attached after six months immersion test in natural seawater in Qingdao.

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal materials, and specifically relates to micro-arc oxidation treatment on the surface of titanium alloys, in particular to an electrolyte for preparing a wear-resistant, corrosion-resistant, and biofouling-resistant ceramic film on the surface of titanium alloys by a micro-arc oxidation method. Micro-arc oxidation method of operation. Background technique [0002] For most equipment and materials used in the marine environment, biofouling and microbial corrosion are caused by the attachment and proliferation of various microorganisms and marine organisms, resulting in a significant reduction in their service performance and lifespan. Biofouling will increase the dynamic resistance of pipe walls and ship hulls, increase the thermal resistance and water pressure of heat exchangers, and cause clogging of porous elements such as filters. The data show that a 0.1mm thick biofilm wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
Inventor 于思荣姚强刘恩洋
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)