Method for detecting hot dip galvanizing plate iron aluminum central layer thickness
A technology of hot-dip galvanizing and intermediate layer, applied in hot-dip galvanizing process, coating, measuring device, etc., can solve the problems of high accuracy, slow speed, poor accuracy, etc., and achieve the effect of simple method
Inactive Publication Date: 2009-01-21
SHOUGANG CORPORATION
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[0003] The purpose of the present invention is to provide a method for detecting the thickness of the iron-aluminum intermediate layer of a hot-dip galvanized sheet, which overcomes the shortcomings of slow speed and poor accuracy in the measurement process of the iron-aluminum intermediate layer of a galvanized sheet, and can not only measure the thickness of the iron-aluminum intermediate layer It can also measure the thickness of other metal thin coatings, and the measurement speed is fast and the accuracy is high.
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[0010] Process the galvanized sheet sample to be measured into a disc shape, clean the surface with absolute ethanol and fully dry it. During the test, the sample is placed on the sample table, and the galvanized layer is peeled layer by layer from the surface of the sample by cathodic sputtering. The peeling layer should be parallel to the surface of the original sample, which results in a nearly flat pit. The thickness of each sample peeled off can be easily controlled by adjusting operating parameters, such as discharge voltage, current, and gas pressure. The depth of analysis can range from a few nanometers to tens of microns.
[0011] Record the peeling depth of each layer and analyze the composition of the corresponding peeling layer. The composition of each peeling layer can be drawn with the change curve of the peeling depth (including the galvanized layer, the zinc-aluminum intermediate layer and the steel substrate near the iron-aluminum intermediate layer Part), the thi...
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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 [0001] The invention belongs to the technical field of steel sheet surface detection, and in particular provides a method for detecting the thickness of the iron-aluminum intermediate layer of a hot-dip galvanized sheet, which can quickly measure the iron-aluminum between the substrate and the galvanized layer of the hot-dip galvanized sheet in the iron and steel metallurgy industry The thickness of the middle layer. Background technique [0002] Hot-dip galvanizing on the surface of the steel plate is an effective method to improve the corrosion resistance of the substrate and has been widely used in the iron and steel metallurgy industry. Good adhesion between the substrate and the galvanized layer is the key factor to improve its corrosion resistance, and the iron-aluminum intermediate layer between the substrate and the galvanized layer can ensure that the galvanized layer has good adhesion. Since the iron-aluminum intermediate layer is very thin and between t...
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Login to View More IPC IPC(8): G01B11/06G01N21/67C23C2/06
Inventor 张召恩滕华湘杨瑞枫
Owner SHOUGANG CORPORATION