CN218601224U

CN218601224U - Ladder contrast test block for coating thickness measurement

Info

Publication number: CN218601224U
Application number: CN202222577420.9U
Authority: CN
Inventors: 林东; 索琪; 蔡绪明; 董军; 贾晓红; 黄滨安
Original assignee: Sinopec Oilfield Equipment Corp; Sinopec Petroleum Engineering Machinery Co Ltd Shashi Steel Pipe Works Branch
Current assignee: Sinopec Oilfield Equipment Corp; Sinopec Petroleum Engineering Machinery Co Ltd Shashi Steel Pipe Works Branch
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-03-10
Anticipated expiration: 2032-09-28

Abstract

The utility model provides a ladder contrast test block for coating thickness measurement, which comprises a base body and a coating from bottom to top; the material of the substrate is consistent with that of the workpiece to be detected, the spraying process and the surface state of the coating are consistent with those of the workpiece to be detected, and the coating comprises an epoxy powder layer, an adhesive layer and a polyethylene layer; the test block composed of the substrate and the coating is divided into: the first area, the second area, the third area and the fourth area are distributed in a step shape. The measurement result is closer to the real thickness value of a real object, inconsistent conclusions generated by errors among different instruments are eliminated, and meanwhile, data of different curvature detection surfaces can be corrected. The accuracy of real object detection is improved, the product quality can be rapidly and truly reflected, and the data is true and reliable. Has strong adaptability and simple carrying and operation.

Description

Ladder contrast test block for coating thickness measurement

Technical Field

The utility model belongs to the technical field of metal coating detects and specifically relates to a ladder contrast test block that is used for coating thickness measurement is related to.

Background

At present, for thickness detection of a non-metal coating, plastic films and organic glass sheets with different thicknesses are generally adopted as calibration test pieces to simulate the coating, and an iron-based or non-iron-based metal block is adopted as a matrix and a zero calibration material. In the actual detection process of the steel pipeline, the same standard test piece instrument is accurately calibrated, the thickness of the same product is detected at the same position (the measurement precision reaches micron level), different coating thickness gauges qualified through metrological verification are adopted for measurement, and different thickness readings are displayed. Particularly, when the thickness of each layer of the anticorrosive coating is close to a standard limit value, different ultrasonic thickness gauges have a certain error range, and two completely different detection results of the coating of the different ultrasonic thickness gauges at the same position can occur: and (4) passing and failing. Because the detection site has no other means for checking, destructive sampling inspection cannot be carried out on the detected part. At the moment, the site detection can only be carried out through a third-party detection mechanism, time and labor are wasted, and the project progress is also influenced, so that manufacturers, construction parties and owners are very worried but cannot avoid the problem. For this reason we propose a step comparison block for coating thickness measurement to solve the above problems.

Chinese patent document CN207964742U describes a coated ultrasonic testing reference block, which comprises a cuboid-shaped block body (1), wherein the lower surface of the block body (1) is a rectangle with a length a and a width b, the height of the block body (1) is c, wherein a is more than c and more than b, the length of the front surface side of the block body (1) is a and the width is c, a plurality of testing holes (2) are arranged on the front surface side from top to bottom, the central lines of the testing holes (2) are positioned on the same vertical plane, and the depths of all the testing holes (2) are equal. The accuracy of directly detecting the surface of the workpiece without being polished is greatly improved. However, the device cannot reasonably correct actual detection data, so that the measurement result is closer to the actual value of the object, and the use has defects and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a ladder contrast test block for coating thickness measuring confirms the deviation of different thickness gauge readings, can carry out reasonable correction to actual detection data simultaneously for measuring result is close true value in kind more, eliminates the inconsistent conclusion of the error production between the different instruments, has improved detection accuracy in kind, repeatability and actual detection efficiency.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the ladder contrast test block for measuring the thickness of the coating comprises a substrate and a coating from bottom to top;

the material of the substrate is consistent with that of the workpiece to be detected, the spraying process and the surface state of the coating are consistent with those of the workpiece to be detected, and the coating comprises an epoxy powder layer, an adhesive layer and a polyethylene layer;

the test block composed of the substrate and the coating is divided into: the first area, the second area, the third area and the fourth area are distributed in a step shape.

In a preferred scheme, the first area is a base body, the second area comprises the base body and an epoxy powder layer, the third area comprises the base body, the epoxy powder layer and an adhesive layer, and the fourth area comprises the base body, the epoxy powder layer, the adhesive layer and a polyethylene layer.

In the preferred scheme, the substrate is cut under the steel pipe of the workpiece to be detected of the same batch of finished products, the substrate is of an arc structure, and the comparison test block is manufactured by cold cutting of 50 x 200 mm.

In a preferable scheme, the thickness of the epoxy powder layer (6) is 0.2 to 0.35mm, the thickness of the adhesive layer (7) is 0.17 to 0.25mm, and the thickness of the coating is 1.8 to 2.9mm.

In a preferred embodiment, the thickness of the first, second, third and fourth areas of the reference block is measured by dividing the ruler.

In a preferred embodiment, the thickness of the coating covering the respective areas is measured by a thickness gauge in the second, third and fourth areas.

The beneficial effects of the utility model are that: through actual detection exploration, a coating thickness measurement step comparison test block consistent with a product is adopted, and all factors influencing detection accuracy are compared, so that a measurement result is closer to a real thickness value of a real object, inconsistent conclusions caused by errors among different instruments are eliminated, and meanwhile, data of detection surfaces with different curvatures can be corrected. The accuracy of physical detection is improved, the detection process is visual, the data is reliable, the result is real and credible, and the application is simple and easy. The nondestructive thickness detection of the thickness of the three-layer coating is carried out in actual engineering repeatedly and randomly for many times from production process inspection, finished product detection, supervision and sampling inspection, to goods acceptance inspection, completion acceptance inspection and the like, detection environments, instruments, methods and personnel are different, the technology can rapidly and truly reflect the product quality, and data are real and reliable. The method is widely applied to the fields of production, inspection, monitoring, dispute and sanction of metal anticorrosive products and the like, and has the advantages of strong adaptability, simple carrying and operation, fairness and authority of measured data and great popularization value.

Drawings

The present invention will be further explained with reference to the drawings and examples;

FIG. 1 is an isometric view of the overall structure of the present invention;

FIG. 2 is a front view of a reference block of the present invention;

in the figure: a first region 1; a second region 2; a third region 3; a fourth region 4; a base body 5; an epoxy powder layer 6; an adhesive layer 7; a polyethylene layer 8; a coating 9; a micrometer 10; and a thickness gauge 11.

Detailed Description

Example 1:

as shown in fig. 1-2, the step contrast block for coating thickness measurement comprises a substrate 5 and a coating 9 from bottom to top;

the base body 5 is consistent with the material of the workpiece to be detected, the spraying process and the surface state of the coating are consistent with the workpiece to be detected, and the coating 9 comprises an epoxy powder layer 6, an adhesive layer 7 and a polyethylene layer 8;

the test block consisting of the matrix 5 and the coating 9 is divided into: the first region 1, the second region 2, the third region 3 and the fourth region 4 are distributed in a step shape. By this structure, micrometer 10 can measure the base member 5, epoxy powder layer 6, the definite thickness of adhesive layer 7 and polyethylene layer 8, the different thickness gauges 11 of difference can measure respectively and go up the different thickness of various coatings in the region respectively on first region 1, second zone 2, third region 3 and the fourth region 4, the thickness that measures through thickness gauge 11 compares with micrometer 10 measuring actual thickness, in order to select thickness gauge 11 that the error is minimum, in order to eliminate the error between the different thickness gauges 11, confirm correct conclusion, can also revise different camber detection face data simultaneously.

Through actual detection exploration, a coating thickness measurement step comparison test block consistent with a product is adopted, and all factors influencing detection accuracy are compared, so that a measurement result is closer to a real thickness value of a real object, inconsistent conclusions caused by errors among different instruments are eliminated, and meanwhile, data of detection surfaces with different curvatures can be corrected. The accuracy of the physical detection is improved, the detection process is visual, the data is reliable, the result is real and credible, and the application is simple and easy. The nondestructive thickness detection of the thickness of the three-layer coating is carried out in actual engineering repeatedly and randomly for many times from production process inspection, finished product detection, supervision and sampling inspection, to goods acceptance inspection, completion acceptance inspection and the like, detection environments, instruments, methods and personnel are different, the technology can rapidly and truly reflect the product quality, and data are real and reliable. The method is widely applied to the fields of production, inspection, monitoring, dispute and sanction of metal anticorrosive products and the like, has strong adaptability, is simple and convenient to carry and operate, has fairness and authority on measured data, and has great popularization value.

In a preferred scheme, the first area 1 is a substrate 5, the second area 2 comprises a substrate 5 and an epoxy powder layer 6, the third area 3 comprises a substrate 5, an epoxy powder layer 6 and an adhesive layer 7, and the fourth area 4 comprises a substrate 5, an epoxy powder layer 6, an adhesive layer 7 and a polyethylene layer 8. According to the structure, the test block comprises a base body 5, an epoxy powder layer 6, an adhesive layer 7 and a polyethylene layer 8 from bottom to top, and the first area 1, the second area 2, the third area 3 and the fourth area 4 are arranged, so that the micrometer 10 can measure the actual thicknesses of the base body 5, the epoxy powder layer 6, the adhesive layer 7 and the polyethylene layer 8;

so that the thickness gauge 11 can measure the thickness of the substrate 5, the epoxy powder layer 6, the adhesive layer 7 and the polyethylene layer 8, and the measured values of different thickness gauges 11 can be compared and corrected with the actual thickness.

In the preferred scheme, the substrate 5 is cut under the steel pipe of the finished product to be detected in the same batch, the substrate 5 is of an arc structure, and the comparison test block is manufactured by cold cutting with the size of 50 multiplied by 200 mm. The structure ensures that the whole test block is consistent with the material of the detected workpiece, and eliminates the influence of other factors on the measured thickness.

In a preferable scheme, the thickness of the epoxy powder layer (6) is 0.2 to 0.35mm, the thickness of the adhesive layer (7) is 0.17 to 0.25mm, and the thickness of the coating is 1.8 to 2.9mm. According to the structure, the thickness of the epoxy powder layer (6) is 0.2-0.35mm, the thickness of the adhesive layer (7) is 0.17-0.25mm, the thickness of the coating is 1.8-2.9mm, and the thickness of each layer meets the detection standard of the steel pipe anticorrosive coating.

In a preferred embodiment, the thickness of each of the first region 1, the second region 2, the third region 3 and the fourth region 4 is measured by a ruler 10. With the structure, the micrometer 10 can measure the actual thickness of the substrate 5, the epoxy powder layer 6, the adhesive layer 7 and the polyethylene layer 8

In a preferred embodiment, the second, third and

fourth regions

2, 3, 4 are coated with a coating thickness measured by a thickness gauge 11. With the structure, the thickness gauge 11 can measure the thickness of the substrate 5, the epoxy powder layer 6, the adhesive layer 7 and the polyethylene layer 8, and the deviation of the readings of different thickness gauges can be determined very intuitively, so that the measured values of different thickness gauges (11) can be compared and corrected with the actual thickness.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. A ladder contrast test block for coating thickness measurement, characterized by: comprises a substrate (5) and a coating (9) from bottom to top;

the base body (5) is consistent with the material of the workpiece to be detected, the spraying process and the surface state of the coating are consistent with the workpiece to be detected, and the coating (9) comprises an epoxy powder layer (6), an adhesive layer (7) and a polyethylene layer (8);

the test block composed of the substrate (5) and the coating (9) is divided into the following parts in sequence: the novel LED display screen comprises a first area (1), a second area (2), a third area (3) and a fourth area (4), wherein the first area (1), the second area (2), the third area (3) and the fourth area (4) are distributed in a step shape.

2. The stepped contrast block for coating thickness measurement according to claim 1, wherein: the first area (1) is a base body (5), the second area (2) comprises the base body (5) and an epoxy powder layer (6), the third area (3) comprises the base body (5), the epoxy powder layer (6) and an adhesive layer (7), and the fourth area (4) comprises the base body (5), the epoxy powder layer (6), the adhesive layer (7) and a polyethylene layer (8).

3. The stepped contrast block for coating thickness measurement according to claim 1, wherein: the substrate (5) is cut under the steel pipes of the workpieces to be detected of the same batch of finished products, the substrate (5) is of an arc-shaped structure, and the reference block is made by cold cutting of 50 mm by 200 mm.

4. The stepped contrast block for coating thickness measurement according to claim 1, wherein: the thickness of the epoxy powder layer (6) is 0.2 to 0.35mm, the thickness of the adhesive layer (7) is 0.17 to 0.25mm, and the thickness of the coating is 1.8 to 2.9mm.

5. The stepped contrast block for coating thickness measurement according to claim 1, wherein: the thicknesses of the first region (1), the second region (2), the third region (3) and the fourth region (4) of the reference block are measured by a scale (10).

6. The step contrast block for measuring the thickness of a coating according to claim 1, wherein: the second (2), third (3) and fourth (4) regions are coated with a coating thickness measured by a thickness gauge (11) over the respective regions.