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Method for quantitative description of surface color and luster degree of galvanized plate

A quantitative description and color degree technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of rapid evaluation of the surface color of galvanized sheet, etc., to improve the surface color, high work efficiency, realize The effect of online detection

Active Publication Date: 2014-01-29
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no method for rapid on-site evaluation of the surface color of galvanized sheets

Method used

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  • Method for quantitative description of surface color and luster degree of galvanized plate
  • Method for quantitative description of surface color and luster degree of galvanized plate
  • Method for quantitative description of surface color and luster degree of galvanized plate

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with specific examples.

[0039] The method for quantitatively describing the surface color of galvanized sheet of the present invention comprises the following steps:

[0040] 1) Establish the relationship between the surface roughness Ra and the diffusion parameter σ, as shown in formula (1), where a, b, c, d, and e are five undetermined coefficients:

[0041] σ 2 = aR a 2 + bR a + c ( R a + d ) 2 ( ...

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Abstract

The invention provides a method for quantitative description of the surface color and luster degree of galvanized plates. The method comprises the steps of (1) establishing a functional relation formula of the surface roughness Ra and a diffusion parameter sigma; (2) selecting at least 5 galvanized plates different in color intensity, respectively measuring the surface roughness Ra and the diffusion parameter sigma of each plate to obtain a formula determined by undetermined coefficients; (3) selecting the galvanized plates with normal surfaces, measuring the surface roughness Ra0, calculating the diffusion parameter sigma0 through the formula and using the diffusion parameter sigma0 as a reference; (4) measuring the surface roughness Ran of the galvanized plates having chromatic aberration and calculating the diffusion parameter sigman through the formula; (5) comparing the sigman with the sigma0, wherein the plates are brighter if a sigman-sigma0 numerical value is a positive number, the color and luster degree is higher if the value is larger, the plates are dimmer if the sigman-sigma0 numerical value is a negative number, and the color and luster degree is lower if the value is larger. The method utilizes online quantification of the surface color and luster degree of the galvanized plates to determine the chromatic aberration level of the surfaces of galvanized steel plates and is simple in operation, practical and high in working efficiency.

Description

technical field [0001] The invention relates to a method for evaluating the surface quality of a galvanized sheet, in particular to a method for quantitatively describing the surface color of a galvanized sheet. Background technique [0002] Due to the uneven thickness of the coating, the ups and downs of the coating, and the different thickness of the oxide film, it is difficult to obtain a uniform appearance of the galvanized sheet without spangles. Light is refracted to the surface to form a color difference, which greatly affects the appearance quality and corrosion resistance of the galvanized sheet, thereby affecting the market competitiveness of the galvanized sheet. The galvanized sheet applied to the outer panels of automobiles has high requirements on color, otherwise it will seriously affect the quality of subsequent painting, thereby seriously affecting the appearance of the car body. [0003] If you want to solve the color problem of galvanized sheet, you must ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 杨芃代敏敏陈晓海王元勋彭炜陈建桥范庆国刘海军
Owner 武汉钢铁有限公司
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