CN101349546A - Method for detecting hot dip galvanizing plate iron aluminum central layer thickness - Google Patents
Method for detecting hot dip galvanizing plate iron aluminum central layer thickness Download PDFInfo
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- CN101349546A CN101349546A CNA2008101198141A CN200810119814A CN101349546A CN 101349546 A CN101349546 A CN 101349546A CN A2008101198141 A CNA2008101198141 A CN A2008101198141A CN 200810119814 A CN200810119814 A CN 200810119814A CN 101349546 A CN101349546 A CN 101349546A
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Abstract
A process for detecting the thickness of an iron-aluminum intermediate layer of a hot-dip galvanizing plate belongs to the technical field of the steel plate surface detection, which comprises the following steps: processing a measured galvanizing plate into plate form samples, processing samples into disc shape with 3-10cm diameter based on the thickness of the galvanizing plate, and cleaning and drying the surfaces of the samples with absolute ethyl alcohol, then peeling the coating layer by layer through adopting the glow spectrum method, detecting the composition of each layer, and stopping the measure when the measured composition is consistent with the composition of a steel plate basal body, drawing the relationships curve line of composition varying as the thickness of the coating according to the relationships of thickness and composition in each measurement, accurately calculating the thickness of the iron-aluminum intermediate layer according to the variation discipline of iron, zinc and aluminum as the thickness, and accurately calculating the thickness of a pure zinc layer. The invention has the beneficial effects that the process can measure the thickness of the galvanizing coating as measuring the thickness of the iron-aluminum intermediate layer between the galvanizing plate basal body and the galvanizing layer, and the process is simple, rapid and accurate.
Description
Technical field
The invention belongs to surface of steel plate detection technique field, a kind of method that detects the hot dip galvanizing plate iron aluminum intermediate layer thickness particularly is provided, can measure the thickness of the iron aluminum middle layer between iron and steel metallurgical industry galvanizing by dipping board substrate and the zinc coat fast.
Background technology
Carrying out galvanizing by dipping at surface of steel plate is to improve the corrosion proof a kind of effective ways of matrix, has obtained widespread use at iron and steel metallurgical industry.Having good adhesion between matrix and the zinc coat is to improve its corrosion proof key factor, and the iron aluminum middle layer between matrix and the zinc coat can guarantee that zinc coat has good adhesion.Because the iron aluminum middle layer is very thin, and is in the middle of matrix and the zinc coat, it is slow to measure its thickness speed with conventional method, and relatively more difficult, influences the technology adjustment in the production run easily, brings problem for the galvanized sheet quality.
Summary of the invention
The object of the present invention is to provide a kind of method that detects the hot dip galvanizing plate iron aluminum intermediate layer thickness, overcome that galvanized sheet iron aluminum middle layer measuring process medium velocity is slow, the shortcoming of poor accuracy, can not only measure the thickness of iron aluminum middle layer, the thickness of other metal foil coating of energy measurement also, and the speed of measuring is fast, accuracy is high.
The technical solution adopted for the present invention to solve the technical problems is: measured galvanized sheet is processed into the sheet sample, sample can be processed into the disc of 3～10 cm diameters, thickness is as the criterion with the thickness of galvanized sheet, specimen surface is cleaned up and drying with absolute ethyl alcohol.Adopt the aura spectroscopic methodology successively to peel off coating then, detect the composition of each layer, when the composition that measures is consistent with the steel matrix composition, stop to measure.According to the relation of the thickness and the composition of each measurement, draw composition with thickness of coating variation relation curve, can choose one or several composition (as iron, zinc, the aluminium etc.) curve plotting that has the greatest impact.According to the content of iron, zinc, aluminium in the coating Changing Pattern, can calculate the thickness of the aluminum middle layer that taps a blast furnace fast and accurately with thickness.Simultaneously, also can calculate the thickness of pure zinc layer fast and accurately.
Composition by drawing peel ply can be determined the thickness of iron aluminum middle layer with stripping depth variation relation curve, can also measure the thickness of pure zinc layer.The thickness that detects can be between 30 nanometers to 50 micron.
Aura spectroscopic methodology of the present invention is to add sufficiently high voltage (250V-2000V) between positive and negative two electrodes that insert discharge gas (normally argon gas), makes discharge gas disassociation becoming positive charge ion and free ion.Positive charge ion accelerates to cathode surface (with testing sample as negative electrode), and knock-on ion is transmitted their kinetic energy to cathode surface, sputters atom, ion, secondary electron etc.Sample atoms is excited in the plasma, with each ion collision, excites to be excited state, and when the atom of the excited state of aura spectrum discharge sputter returned ground state, discharging certain energy was the light of certain wavelength, and the characteristic wavelength of different elements has nothing in common with each other.The light of different wave length is through the beam splitting system beam split and detect each monochromatic light light intensity, through the signal Processing of computing machine, has obtained the intensity of each element.By the typical curve of each element of having set up, calculate the concentration of each element be in layer because the sample that shifts out sample from specimen surface by cathodic sputtering is peeled off, and more or less be parallel to original specimen surface, cause a nearly flat hole.Therefore, this technology is applicable to the case depth profile analysis.Peeling off of sample can be controlled as sparking voltage, electric current and gaseous tension easily by regulating operating parameter.
Surface clean of the present invention is to adopt absorbent cotton that absolute ethyl alcohol soaks the pollutant wiped clean of specimen surface.
The invention has the beneficial effects as follows: in the iron aluminum middle layer thickness of measuring between galvanized sheet matrix and the zinc coat, can also measure the thickness of zinc coat.This method is easy, quick, accurate.
Description of drawings
Fig. 1 is for adopting the schematic diagram of aura spectroscopy measurements galvanized sheet iron aluminum middle layer method.
Embodiment
Measured galvanized sheet sample is processed into the disk shape, clean and fully dry with absolute ethyl alcohol surface clean.During test, sample is placed on the sample stage, in layer peels off zinc coat by cathodic sputtering from specimen surface, peel ply should be parallel to original specimen surface, so just causes a nearly flat hole.The thickness that sample is peeled off at every turn can be controlled as sparking voltage, electric current and gaseous tension easily by regulating operating parameter, and the depth range of analysis can be from several nanometers to tens micron.
Write down the degree of depth that each layer peeled off, the peel ply that reaches correspondence carries out constituent analysis, can draw the change curve (comprise zinc coat, zinc-aluminium middle layer and steel matrix near iron aluminum middle layer part) of the composition of each peel ply with stripping depth, the thickness of ferroaluminium layer can be determined according to the Changing Pattern of curve, the thickness of pure zinc layer can also be determined.
Fig. 1 is the schematic diagram that adopts aura spectroscopy measurements galvanized sheet iron aluminum middle layer method.Choose Fe, Zn, three elements of Al carry out constituent analysis, ordinate is the content of different elements, horizontal ordinate is for fathoming.As can be seen, comprehensive three curves can be easy to determine the thickness in zinc-aluminium middle layer, (c-b) are the thickness in this middle layer, can also determine that the thickness of pure zinc layer is (b-a).
Adopt the method to detect the thickness of iron aluminum middle layer, have easy, characteristics fast and accurately.
Claims (4)
1, a kind of method that detects the hot dip galvanizing plate iron aluminum intermediate layer thickness is characterized in that, detects step to be: measured galvanized sheet is processed into the sheet sample, specimen surface is cleaned up and drying; Adopt the aura spectroscopic methodology successively to peel off coating then, detect the composition of each layer, when the composition that measures is consistent with the steel matrix composition, stop to measure; According to the relation of the thickness and the composition of each measurement, draw composition with thickness of coating variation relation curve, according to the content of iron, zinc, aluminium in the coating Changing Pattern, calculate the thickness of the aluminum middle layer that taps a blast furnace accurately with thickness; Calculate the thickness of pure zinc layer accurately.
According to the described method of claim, it is characterized in that 2, the thickness of detection is between 30 nanometers to 50 micron.
According to the described method of claim, it is characterized in that 3, described aura spectroscopic methodology is the voltage that adds 250V-2000V between positive and negative two electrodes that insert discharge gas, make discharge gas disassociation becoming positive charge ion and free ion; Positive charge ion accelerates to cathode surface, and knock-on ion is transmitted their kinetic energy to cathode surface, sputters atom, ion, secondary electron; Sample atoms is excited in the plasma, with each ion collision, excites to be excited state, when the atom of the excited state of aura spectrum discharge sputter returns ground state, releases energy, and the characteristic wavelength of different elements has nothing in common with each other; The light of different wave length is through the beam splitting system beam split and detect each monochromatic light light intensity, through the signal Processing of computing machine, has obtained the intensity of each element; By the typical curve of each element of having set up, calculate the concentration of each element, peeling off by regulating operating parameter sparking voltage, electric current and gaseous tension of sample controlled.
According to the described method of claim, it is characterized in that 4, the absorbent cotton that the employing absolute ethyl alcohol soaks is the pollutant wiped clean of specimen surface.
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| CNA2008101198141A CN101349546A (en) | 2008-09-11 | 2008-09-11 | Method for detecting hot dip galvanizing plate iron aluminum central layer thickness |
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| CNA2008101198141A CN101349546A (en) | 2008-09-11 | 2008-09-11 | Method for detecting hot dip galvanizing plate iron aluminum central layer thickness |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269565A (en) * | 2010-06-07 | 2011-12-07 | 鞍钢股份有限公司 | Method for testing thickness of metal transition layer |
| CN101509894B (en) * | 2009-03-23 | 2012-06-27 | 首钢总公司 | Method for measuring scale element distribution in thickness direction |
| CN103335996A (en) * | 2013-06-06 | 2013-10-02 | 首钢总公司 | Measuring method for weight of passivating film of galvanized plate |
| CN103453861A (en) * | 2013-09-06 | 2013-12-18 | 鞍钢股份有限公司 | Method for measuring thickness of zinc coating |
| CN103983201A (en) * | 2014-05-14 | 2014-08-13 | 首钢总公司 | Method for detecting thickness of phosphating film of cold-rolled sheet |
| CN105136775A (en) * | 2015-09-25 | 2015-12-09 | 内蒙古包钢钢联股份有限公司 | Method for determining content of all elements in galvanized sheet substrate by glow discharge spectrometer |
| CN105181676A (en) * | 2015-09-29 | 2015-12-23 | 内蒙古包钢钢联股份有限公司 | Method for measuring depth and quality of plating of galvanized plate through glow discharge spectrometer |
| CN105627937A (en) * | 2015-12-25 | 2016-06-01 | 东风商用车有限公司 | Method for measuring single-layer film thickness of white paint plate paint film by glow discharge spectrometry |
| CN106645095A (en) * | 2017-02-13 | 2017-05-10 | 首钢总公司 | Method for measuring contents of silicon and aluminum in aluminum silicon plate plating |
| CN106895801A (en) * | 2015-12-18 | 2017-06-27 | 北京有色金属研究总院 | A kind of assay method of Nd Fe B alloys thickness of coating |
| CN107884391A (en) * | 2017-10-12 | 2018-04-06 | 首钢集团有限公司 | Utilize the method for Sheets By Glow Discharge Aes measurement cold-rolled steel sheet zirconium film film weight |
| CN110926399A (en) * | 2019-12-10 | 2020-03-27 | 中国电子科技集团公司第四十六研究所 | Method for testing thickness of metal filament ultrathin metal coating |
| CN112268850A (en) * | 2020-09-16 | 2021-01-26 | 唐山钢铁集团有限责任公司 | Method for evaluating corrosion resistance of coated steel plate |
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2008
- 2008-09-11 CN CNA2008101198141A patent/CN101349546A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509894B (en) * | 2009-03-23 | 2012-06-27 | 首钢总公司 | Method for measuring scale element distribution in thickness direction |
| CN102269565A (en) * | 2010-06-07 | 2011-12-07 | 鞍钢股份有限公司 | Method for testing thickness of metal transition layer |
| CN102269565B (en) * | 2010-06-07 | 2014-11-05 | 鞍钢股份有限公司 | Method for testing thickness of metal transition layer |
| CN103335996A (en) * | 2013-06-06 | 2013-10-02 | 首钢总公司 | Measuring method for weight of passivating film of galvanized plate |
| CN103335996B (en) * | 2013-06-06 | 2015-08-26 | 首钢总公司 | The measuring method that a kind of galvanized sheet passivating film film is heavy |
| CN103453861A (en) * | 2013-09-06 | 2013-12-18 | 鞍钢股份有限公司 | Method for measuring thickness of zinc coating |
| CN103983201A (en) * | 2014-05-14 | 2014-08-13 | 首钢总公司 | Method for detecting thickness of phosphating film of cold-rolled sheet |
| CN105136775A (en) * | 2015-09-25 | 2015-12-09 | 内蒙古包钢钢联股份有限公司 | Method for determining content of all elements in galvanized sheet substrate by glow discharge spectrometer |
| CN105181676A (en) * | 2015-09-29 | 2015-12-23 | 内蒙古包钢钢联股份有限公司 | Method for measuring depth and quality of plating of galvanized plate through glow discharge spectrometer |
| CN106895801A (en) * | 2015-12-18 | 2017-06-27 | 北京有色金属研究总院 | A kind of assay method of Nd Fe B alloys thickness of coating |
| CN105627937A (en) * | 2015-12-25 | 2016-06-01 | 东风商用车有限公司 | Method for measuring single-layer film thickness of white paint plate paint film by glow discharge spectrometry |
| CN105627937B (en) * | 2015-12-25 | 2018-08-03 | 东风商用车有限公司 | Method for measuring single-layer film thickness of white paint plate paint film by glow discharge spectrometry |
| CN106645095A (en) * | 2017-02-13 | 2017-05-10 | 首钢总公司 | Method for measuring contents of silicon and aluminum in aluminum silicon plate plating |
| CN107884391A (en) * | 2017-10-12 | 2018-04-06 | 首钢集团有限公司 | Utilize the method for Sheets By Glow Discharge Aes measurement cold-rolled steel sheet zirconium film film weight |
| CN110926399A (en) * | 2019-12-10 | 2020-03-27 | 中国电子科技集团公司第四十六研究所 | Method for testing thickness of metal filament ultrathin metal coating |
| CN112268850A (en) * | 2020-09-16 | 2021-01-26 | 唐山钢铁集团有限责任公司 | Method for evaluating corrosion resistance of coated steel plate |
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Open date: 20090121 |