CN108956446A - The test method of hard alloy corrosion resistance - Google Patents
The test method of hard alloy corrosion resistance Download PDFInfo
- Publication number
- CN108956446A CN108956446A CN201811196051.0A CN201811196051A CN108956446A CN 108956446 A CN108956446 A CN 108956446A CN 201811196051 A CN201811196051 A CN 201811196051A CN 108956446 A CN108956446 A CN 108956446A
- Authority
- CN
- China
- Prior art keywords
- hard alloy
- corrosion resistance
- sample
- test method
- alloy corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a kind of test methods of hard alloy corrosion resistance, the following steps are included: step A, preparing hard alloy sample using conventional sintering, and after carrying out magnetic saturation measurement to each sample, it is polished using diamond slurry, is then cleaned in ultrasonic bath with ethyl alcohol, finally obtains sample after heated-air drying；Step B, it is electrochemically reacted at normal temperature using 1% hydrochloric acid or sulfuric acid solution, using argon gas as circulatory mediator；Step C, step D, the fusion limit using timing Amperometric to hard alloy in the pseudo- antiphase region for mixing vanadium carbide starches in the samples weighing that step C is obtained and the sulfuric acid solution of immersion 1% at room temperature, measures the mass loss of sample respectively by the period.Operation of the invention is convenient, can efficiently and accurately obtain the corrosion resistance experimental result of hard alloy, to provide foundation to improve hard alloy corrosion resistance, is conducive to reach big batch use, strong applicability and practicability is good.
Description
Technical field
The invention belongs to hard alloy test method technical fields, and in particular to a kind of test of hard alloy corrosion resistance
Method.
Background technique
Hard alloy is widely used in petroleum and turns spy, mining, machine since it has high-intensitive, high rigidity characteristic
The industries such as tool processing, space flight and aviation, chemical industry manufacture.But because use environment is hard there are often leading to when stronger sour corrosion
The service life of matter alloy declines, and in other words, is unable to satisfy the demand of industry.So applicability and practicability are restricted.
Summary of the invention
The object of the present invention is to provide a kind of test methods of hard alloy corrosion resistance.
The technical solution for realizing the object of the invention is a kind of test method of hard alloy corrosion resistance, including following step
It is rapid:
Step A, hard alloy sample is prepared using conventional sintering, and after carrying out magnetic saturation measurement to each sample, using gold
Hard rock slurry is polished, and is then cleaned in ultrasonic bath with ethyl alcohol, finally obtains sample after heated-air drying；
Step B, it is electrochemically reacted at normal temperature using 1% hydrochloric acid or sulfuric acid solution, using argon gas as circulatory mediator；
Step C, the fusion limit using timing Amperometric to hard alloy in the pseudo- antiphase region for mixing vanadium carbide,
Step D, it in the samples weighing and the sulfuric acid solution of immersion 1% that slurry step C is obtained at room temperature, is surveyed respectively by the period
The mass loss for measuring sample, obtains hard alloy corrosion resistance result.
In step, the hard alloy sample is using the hard alloy of 6% cobalt content and the hard alloy of 9% cobalt content.
In step, the partial size of diamond is 1um in diamond slurry.
In stepb, a platinum sheet electrode is used in electrochemical reaction and uses saturated calomel electrode (SCE) as reference
Electrode, for standard hydrogen electrode, electrode potential 240mV.
In step C, using timing Amperometric to the hard alloy of 6% and 9% cobalt content in the pseudo- reverse phase for mixing vanadium carbide
The fusion limit in area, including actively and false two groups of experiments of current potential and timing ampere current potential is obtained using potential polarization curve.
In step D, the period is respectively first day, third day, the tenth day and the 30th day, and wherein for two groups of experiments
One group is often stirred, and is completed under another group of non-stirred state.
The present invention has the effect of positive: operation of the invention is convenient, can efficiently and accurately obtain the resistance to of hard alloy
Corrosion test is conducive to reach big batch use, be applicable in as a result, to provide foundation to improve hard alloy corrosion resistance
The strong and practicability of property is good.
Specific embodiment
(embodiment 1)
A kind of test method of hard alloy corrosion resistance, comprising the following steps:
Step A, hard alloy sample is prepared using conventional sintering, and after carrying out magnetic saturation measurement to each sample, using gold
Hard rock slurry is polished, and is then cleaned in ultrasonic bath with ethyl alcohol, finally obtains sample after heated-air drying；
Step B, it is electrochemically reacted at normal temperature using 1% hydrochloric acid or sulfuric acid solution, using argon gas as circulatory mediator；
Step C, the fusion limit using timing Amperometric to hard alloy in the pseudo- antiphase region for mixing vanadium carbide,
Step D, it in the samples weighing and the sulfuric acid solution of immersion 1% that slurry step C is obtained at room temperature, is surveyed respectively by the period
The mass loss for measuring sample, obtains hard alloy corrosion resistance result.
In the present embodiment, magnetic saturation measurement, the saturation magnetization (being indicated with Ms) of hart metal product, with cobalt content
Increase and increases.Castle and intensity reduce with hard alloy carbon content and are declined.The opposite magnetic of the various trades mark of measurement can be passed through
Saturation value finds the correspondence carbon content of hard alloy, and determines the phase constituent of hard alloy, can make hard alloy determination of carbon content
Precision reaches ± 0.01%, is that standard chemical process is unable to reach.It is at present specifically to detect dedicated magnetic using hard alloy to satisfy
It measures with instrument (the also known as full-automatic on-line detecting system of specific saturation magnetization instrument, specifications and models ACOMT-Y), proofreads first
Standard specimen, next will test sample and is sent into magnetic saturation instrument, read the magnetic saturation value of certain hard alloy automatically.
Its timing Amperometric is a kind of dynamic (dynamical) electrochemical methods of Electrode process and technology.It dashes forward on electrolytic cell
So apply an anode potential, make certain electroactive material (or battery depolarizer) in solution that oxidation or reduction reaction occur enough,
The variation of record current and time obtains current versus time curve, therefore claims timing Amperometric.In this experiment, timing amperometric measurement
The result shows that two samples are respectively different numerical value.Applying anode potential similar to the carbide for containing 9% cobalt in hard alloy
Afterwards, the timing ampere curve of active current potential increases, passage then at any time and be gradually reduced.
In step, the hard alloy sample is using the hard alloy of 6% cobalt content and the hard alloy of 9% cobalt content.
In step, the partial size of diamond is 1um in diamond slurry.
In stepb, a platinum sheet electrode is used in electrochemical reaction and uses saturated calomel electrode (SCE) as reference
Electrode, for standard hydrogen electrode, electrode potential 240mV.
In step C, using timing Amperometric to the hard alloy of 6% and 9% cobalt content in the pseudo- reverse phase for mixing vanadium carbide
The fusion limit in area, including actively and false two groups of experiments of current potential and timing ampere current potential is obtained using potential polarization curve.This reality
It applies in example, actively refers to and apply an anode potential, so that the electroactive goods and materials of certain in acid solution is sent oxidation reaction, enough to record
Current densities variation.As cobalt current density pure in this experiment increases with the increase of anodic overvoltage.And the corrosion current of WC is close
Spend obviously several orders of magnitude lower than pure cobalt.
False current potential refers to the pseudo- reversal potential WC in acid solution.The WC of pseudo- reversal potential be it is inert, this experiment is shown
Unstability of the cobalt metal when false current potential WC and pH is 0.Cobalt is simply dissolved into cobalt dioxide and is entered in solution.By sweeping
Retouch the corrosion product that Electronic Speculum has been observed that hard alloy outer surface.Potential polarization curve simultaneously, really a kind of data point
Analysis method studies the timing ampere potential change under dynamic potential polarization curve.Carbide in this experiment containing 9% cobalt is applying sun
After electrode potential, the timing ampere curve of active current potential (360 MV) increases, passage then at any time and be gradually reduced.Low
Oscillating current response is presented in the sample (200 MV) of magnetic saturation value, and stable downward trend is then presented in high magnetically saturated sample.
In step D, the period is respectively first day, third day, the tenth day and the 30th day, and wherein for two groups of experiments
One group is often stirred, and is completed under another group of non-stirred state.
Operation of the invention is convenient, the corrosion resistance experimental result of hard alloy can be efficiently and accurately obtained, to be
Improve hard alloy corrosion resistance and foundation is provided, is conducive to reach big batch use, strong applicability and practicability is good.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And these
Belong to the obvious changes or variations that connotation of the invention is extended out and still falls within protection scope of the present invention.
Claims (6)
1. a kind of test method of hard alloy corrosion resistance, it is characterised in that: the following steps are included:
Step A, hard alloy sample is prepared using conventional sintering, and after carrying out magnetic saturation measurement to each sample, using gold
Hard rock slurry is polished, and is then cleaned in ultrasonic bath with ethyl alcohol, finally obtains sample after heated-air drying；
Step B, it is electrochemically reacted at normal temperature using 1% hydrochloric acid or sulfuric acid solution, using argon gas as circulatory mediator；
Step C, the fusion limit using timing Amperometric to hard alloy in the pseudo- antiphase region for mixing vanadium carbide,
Step D, it in the samples weighing and the sulfuric acid solution of immersion 1% that slurry step C is obtained at room temperature, is surveyed respectively by the period
The mass loss for measuring sample, obtains hard alloy corrosion resistance result.
2. the test method of hard alloy corrosion resistance according to claim 1, it is characterised in that: in step, described
Hard alloy sample is using the hard alloy of 6% cobalt content and the hard alloy of 9% cobalt content.
3. the test method of hard alloy corrosion resistance according to claim 2, it is characterised in that: in step, Buddha's warrior attendant
The partial size of diamond is 1um in stone slurry.
4. the test method of hard alloy corrosion resistance according to claim 3, it is characterised in that: in stepb, electrification
It learns and uses a platinum sheet electrode in reaction and use saturated calomel electrode (SCE) as reference electrode, relative to standard hydrogen electrode
Speech, electrode potential 240mV.
5. the test method of hard alloy corrosion resistance according to claim 4, it is characterised in that: in step C, use
The fusion limit of the timing Amperometric to the hard alloy of 6% and 9% cobalt content in the pseudo- antiphase region for mixing vanadium carbide, including actively and
The two groups of experiments of false current potential simultaneously obtain timing ampere current potential using potential polarization curve.
6. the test method of hard alloy corrosion resistance according to claim 5, it is characterised in that: in step D, the time
Section is respectively first day, third day, the tenth day and the 30th day, and is wherein often stirred for one group for two groups of experiments, and another group non-
It is completed under stirring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811196051.0A CN108956446A (en) | 2018-10-15 | 2018-10-15 | The test method of hard alloy corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811196051.0A CN108956446A (en) | 2018-10-15 | 2018-10-15 | The test method of hard alloy corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108956446A true CN108956446A (en) | 2018-12-07 |
Family
ID=64480965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811196051.0A Pending CN108956446A (en) | 2018-10-15 | 2018-10-15 | The test method of hard alloy corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108956446A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201945546U (en) * | 2011-01-10 | 2011-08-24 | 宁波海科结构腐蚀控制工程技术有限公司 | Portable reinforced concrete corrosion measuring instrument |
| WO2012031181A9 (en) * | 2010-09-03 | 2012-03-29 | Bp Corporation North America Inc. | Methods and devices for sensing corrosion under insulation (cui) |
| CN104075960A (en) * | 2014-06-27 | 2014-10-01 | 天能集团江苏科技有限公司 | Method for rapidly determining corrosion resistance of storage battery grid alloy |
| CN104215565A (en) * | 2013-05-31 | 2014-12-17 | 萨帕铝热传输(上海)有限公司 | Method for testing accelerated corrosion of cooling liquid |
| CN104614310A (en) * | 2015-01-28 | 2015-05-13 | 西安热工研究院有限公司 | High temperature and high pressure corrosion electrochemical measuring device and measuring method |
| CN108226018A (en) * | 2017-11-28 | 2018-06-29 | 航天海鹰(哈尔滨)钛业有限公司 | A kind of titanium alloy Corrosion Protection test device |
-
2018
- 2018-10-15 CN CN201811196051.0A patent/CN108956446A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012031181A9 (en) * | 2010-09-03 | 2012-03-29 | Bp Corporation North America Inc. | Methods and devices for sensing corrosion under insulation (cui) |
| CN201945546U (en) * | 2011-01-10 | 2011-08-24 | 宁波海科结构腐蚀控制工程技术有限公司 | Portable reinforced concrete corrosion measuring instrument |
| CN104215565A (en) * | 2013-05-31 | 2014-12-17 | 萨帕铝热传输(上海)有限公司 | Method for testing accelerated corrosion of cooling liquid |
| CN104075960A (en) * | 2014-06-27 | 2014-10-01 | 天能集团江苏科技有限公司 | Method for rapidly determining corrosion resistance of storage battery grid alloy |
| CN104614310A (en) * | 2015-01-28 | 2015-05-13 | 西安热工研究院有限公司 | High temperature and high pressure corrosion electrochemical measuring device and measuring method |
| CN108226018A (en) * | 2017-11-28 | 2018-06-29 | 航天海鹰(哈尔滨)钛业有限公司 | A kind of titanium alloy Corrosion Protection test device |
Non-Patent Citations (4)
| Title |
|---|
| 刘超: ""混晶WC-8CO硬质合金的制备及性能研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 柳旭: "利用电位阶跃法研究腐蚀体系中腐蚀剂的扩散及实验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 硬质合金电化学腐蚀行为的研究进展: "硬质合金电化学腐蚀行为的研究进展", 《硬质合金》 * |
| 郭智兴，鲜广: "《材料成型及控制工程专业实验教程》", 31 January 2018, 四川大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Izquierdo et al. | Spatially resolved measurement of electrochemical activity and pH distributions in corrosion processes by scanning electrochemical microscopy using antimony microelectrode tips | |
| Nnamchi et al. | Electrochemical characterization of nanomaterials | |
| Thomas et al. | Possibilities and limitations of scanning electrochemical microscopy of Mg and Mg alloys | |
| Souto et al. | Spatially-resolved imaging of concentration distributions on corroding magnesium-based materials exposed to aqueous environments by SECM | |
| Wang et al. | Non-enzymatic amperometric glucose biosensor based on nickel hexacyanoferrate nanoparticle film modified electrodes | |
| Figueiredo-Filho et al. | Inexpensive and disposable copper mini-sensor modified with bismuth for lead and cadmium determination using square-wave anodic stripping voltammetry | |
| Fushimi et al. | Microelectrode techniques for corrosion research of iron | |
| Zhu et al. | Novel dual Pt-Pt/IrOx ultramicroelectrode for pH imaging using SECM in both potentiometric and amperometric modes | |
| Fajardo et al. | A critical review of the application of electrochemical techniques for studying corrosion of Mg and Mg alloys: opportunities and challenges | |
| Qi et al. | Three-dimensional macroporous Cu electrode: Preparation and electrocatalytic activity for nonenzymatic glucose detection | |
| Santos et al. | Fabrication and Use of Dual‐function Iridium Oxide Coated Gold SECM Tips. An Application to pH Monitoring above a Copper Electrode Surface during Nitrate Reduction. | |
| Zhu et al. | Quasi-simultaneous electrochemical/chemical imaging of local Fe2+ and pH distributions on 316 L stainless steel surface | |
| Filotás et al. | Combined amperometric/potentiometric probes for improved chemical imaging of corroding surfaces using scanning electrochemical microscopy | |
| Fushimi et al. | Heterogeneous hydrogen evolution on corroding Fe–3 at.% Si surface observed by scanning electrochemical microscopy | |
| Silva et al. | New fluorinated diamond microelectrodes for localized detection of dissolved oxygen | |
| Ni et al. | Bimetallic CuCo derived from prussian blue analogue for nonenzymatic glucose sensing | |
| Traxler et al. | Scanning electrochemical microscopy methods (SECM) and ion-selective microelectrodes for corrosion studies | |
| Chao et al. | Preparation of a porous Au electrode with a sacrificed Prussian blue analogue template for anodic stripping voltammetric analysis of trace arsenic (III) | |
| Guo et al. | Detection of trace zinc by an electrochemical microsensor based on carbon nanotube threads | |
| Silva et al. | Novel diamond microelectrode for pH sensing | |
| JPH0783881A (en) | Use of electrode system containing measuring electrode, reference electrode and counter electrode in measurement of hydrogen peroxide concentration | |
| CN1916617B (en) | Method for measuring density of corrosion inhibitor | |
| Maile et al. | Evaluation of corrosion and protection of coated metals with local ion concentration technique (LICT) | |
| Westbroek et al. | Electrochemical methods | |
| Holder et al. | Combined scanning electrochemical-atomic force microscopy (SECM-AFM): Simulation and experiment for flux-generation at un-insulated metal-coated probes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |