CN102749280A - Method for measuring corrosion performance of materials - Google Patents
Method for measuring corrosion performance of materials Download PDFInfo
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- CN102749280A CN102749280A CN2012102680937A CN201210268093A CN102749280A CN 102749280 A CN102749280 A CN 102749280A CN 2012102680937 A CN2012102680937 A CN 2012102680937A CN 201210268093 A CN201210268093 A CN 201210268093A CN 102749280 A CN102749280 A CN 102749280A
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Abstract
A method for measuring corrosion performance of materials belongs to the technical field of material corrosion. Test materials include carbon steel, alloy steel, stainless steel and other various materials or nonferrous alloy. Sample state comprises rolling control, rolling control cold control or heat processing. 5%-50% tensile strain preprocessing is conducted before an corrosion test, then mechanical polishing is conducted on a test piece, the test piece is placed in corrosion media after being weighed and is taken out after being placed for a certain time under the opening or closing condition, then the test piece is weighed, and weight change is compared. Corrosion environment temperature is the normal temperature, and the humidity is the relative saturation humidity. The corrosion media comprise gas and liquid, the gas is mixed gas composed of corrosive gas including SO2 and CO2 with certain density, and the liquid includes water solution composed of picric acid and sodium hydroxide and the like. The method has the advantages of being high in test speed, high in result accuracy and simple to operate and is suitable for being applied to quickly detection of corrosion performance of the carbon steel, the alloy steel, the stainless steel and other various materials or nonferrous alloy on a production site.
Description
Technical field
The present invention relates to a kind of method of measuring the material corrosion performance, belong to the material corrosion technical field.
Background technology
At present, the experimental technique of mensuration material corrosion performance comprises chemical immersion experiment, salt mist experiment, atmospheric exposure experiment, electro-chemical test experiment etc.Except that the electro-chemical test experiment, other several kinds of experimental techniques all need consume great amount of time in test process, and the test duration that needs like the atmospheric exposure experiment reaches several years.Reduced the actual evaluation efficient of material corrosion performance to a great extent.Though electro-chemical test experiment can fast measuring sample electrodes current potential; But there are randomness and instability aspect the corrosive nature of analysis of material; Its reason is except that the concentration that receives corrosive medium, temperature and humidity etc. influence, and is also relevant with the structural state of test piece itself.In order to develop the experimental technique of a kind of fast measuring or comparative material corrosive nature; The invention discloses a kind of method of measuring the material corrosion performance; The corrosive nature of material takes place under certain tensile strain condition to measure at material, but the corrosive nature of fast measuring or contrast material.
Summary of the invention
The invention discloses a kind of method of measuring the material corrosion performance.Test material is various iron and steel or non-ferrous alloy materials such as carbon steel, alloy steel and stainless steel.The sample state comprises the state after controlled rolling, controlled rolling and controlled cooling or the thermal treatment.
Realize that technical scheme of the present invention is described below; Before corrosion test, carry out the tensile strain pre-service of 5%-50%, afterwards mechanical grinding is carried out in test piece, weighing is placed in the corrosive medium; Take out weighing test piece weight and weight change relatively after leaving standstill certain hour under the uncovered or airtight condition.
The corrosion environment temperature is a normal temperature, and humidity is relative saturation humidity.Corrosive medium comprises: 1. gas: comprise certain density SO
2, CO
2Mixed gas Deng etchant gas and Atmospheric composition; 2. liquid: comprise the WS that picric acid and NaOH are formed etc.
Outstanding advantage of the present invention is that the tensile strain processing is carried out in test piece in advance; It is fast to measure the corrosion test test speed; Precision is high as a result, and is simple to operate, is fit to be applied to the corrosive nature of various materials such as production scene fast detecting carbon steel, alloy steel and stainless steel or other non-ferrous alloys.
Embodiment
Below in conjunction with embodiment the present invention is explained in detail.
Embodiment 1
The chemical constitution of steel plate and content (percentage by weight) are: C 0.143%, and Si 0.459%, and Mn 1.59%, and P 0.014%, and S 0.005%, and Cu 0.018%, and Cr 0.02%, and Ni 0.014%, and Al 0.023%, and surplus is Fe and unavoidable impurities.Steel plate thickness is 16mm, and the sample state is the normalizing attitude.Before corrosion test, carry out 10% tensile strain pre-service, etchant gas is the SO of 0.05% volumetric concentration
2Atmosphere, environment temperature are 25 ℃, and experimental period is 24 hours, and weighing is accurate to 0.1mg, and experimental result is seen table 1.
Table 1 mechanical property detected value
Claims (2)
1. a method of measuring the material corrosion performance is characterized in that the test material scope comprises various materials of carbon steel, alloy steel and stainless steel or non-ferrous alloy, and the sample state comprises controlled rolling, controlled rolling and controlled cooling or thermal treatment; Material sample carries out 5%-50% tensile strain pre-service before corrosion test, afterwards mechanical grinding is carried out in test piece, and weighing is placed in the corrosive medium, takes out weighing test piece weight and weight change relatively after leaving standstill certain hour under the uncovered or airtight condition; The corrosion environment temperature is a normal temperature, and humidity is relative saturation humidity.
2. a kind of method of measuring the material corrosion performance according to claim 1 is characterized in that corrosive medium comprises gas and liquid, and gas is certain density SO
2, CO
2Mixed gas Deng etchant gas and Atmospheric composition; Liquid is to comprise the WS that picric acid and NaOH are formed etc.
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| CN2012102680937A CN102749280A (en) | 2012-07-31 | 2012-07-31 | Method for measuring corrosion performance of materials |
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| CN2012102680937A CN102749280A (en) | 2012-07-31 | 2012-07-31 | Method for measuring corrosion performance of materials |
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Cited By (5)
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|---|---|---|---|---|
| CN104246072A (en) * | 2012-01-20 | 2014-12-24 | 凯米罗总公司 | Device and method for monitoring biocide dosing in a machine |
| CN105158149A (en) * | 2015-10-10 | 2015-12-16 | 中石化炼化工程（集团）股份有限公司 | Ammonium salt corrosion experimental facility and experimental method thereof |
| CN105181569A (en) * | 2015-09-29 | 2015-12-23 | 中石化炼化工程（集团）股份有限公司 | Ammonium salt under-scale corrosion experiment device and experiment method thereof |
| CN105229444A (en) * | 2013-05-24 | 2016-01-06 | 富士通株式会社 | Environment determinator and environment assay method |
| CN110763612A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Method for researching influence of martensite on stress corrosion cracking performance of austenitic steel |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104246072A (en) * | 2012-01-20 | 2014-12-24 | 凯米罗总公司 | Device and method for monitoring biocide dosing in a machine |
| CN104246072B (en) * | 2012-01-20 | 2017-06-16 | 凯米罗总公司 | Apparatus and method for monitoring bactericide feed in machine |
| CN105229444A (en) * | 2013-05-24 | 2016-01-06 | 富士通株式会社 | Environment determinator and environment assay method |
| CN105229444B (en) * | 2013-05-24 | 2018-04-03 | 富士通株式会社 | Environment determines device and environment assay method |
| CN105181569A (en) * | 2015-09-29 | 2015-12-23 | 中石化炼化工程（集团）股份有限公司 | Ammonium salt under-scale corrosion experiment device and experiment method thereof |
| CN105158149A (en) * | 2015-10-10 | 2015-12-16 | 中石化炼化工程（集团）股份有限公司 | Ammonium salt corrosion experimental facility and experimental method thereof |
| CN110763612A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Method for researching influence of martensite on stress corrosion cracking performance of austenitic steel |
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Application publication date: 20121024 |