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Method and apparatus for testing ice adhesion strength

A technology of adhesion strength and testing method, applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problems of inability to effectively control the amount of icing on the interface, the quality of icing on the surface, poor test repeatability, and large error in test repetition. , to achieve the effect of guaranteed test repeatability, accurate test results and convenient operation

Inactive Publication Date: 2012-12-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Summarizing the methods and devices currently proposed and adopted for testing surface ice adhesion strength, the main problems are: (1) The integrity of the device is poor, and external refrigeration units, external traction devices, etc. are required when measuring ice adhesion; (2) The repeatability of the test is not good. Due to the inability to effectively control the amount of icing on the interface, the quality of icing on the surface of the test specimen, and the influence of too many additional devices (ice making, ice adding containers, etc.), the error of test repetition is large

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  • Method and apparatus for testing ice adhesion strength

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Embodiment 1

[0024] The invention discloses a method and device for testing ice adhesion strength, which characterizes the surface ice adhesion strength by testing the maximum tangential force when the peeled solid surface freezes. Different from existing ice adhesion (or icing) strength test methods: in the method disclosed by the present invention, the process of simulating surface icing adopts the cooling sample first, and then titrates liquid water to make it freeze on the sample surface; to be tested ( Peeling) Icing is an "ice convex hull" formed by quantitative titration of liquid water; the peeling process uses a push plate with a force sensor to push the "ice convex hull" to peel off the surface to be tested or break the ice inside; Therefore, there is no need to consider the icing form formed by quantitative liquid droplets on the surface of the sample to be tested (due to the difference in surface energy at room temperature, the shape of the convex hull of water on different soli...

Embodiment 2

[0033]The invention discloses a device implementation method description. The specific implementation method and key content of the test device for the method disclosed in the present invention are as follows: the refrigeration unit and the frame are connected by a spring, and when the test piece is placed in the fixed frame, the spring under the refrigeration unit is deformed and stressed, so that the lower surface of the sample is in contact with the refrigeration unit. In close contact, the upper surface is accurately embedded in the fixed frame to maintain the test position; the temperature of the refrigeration unit is controlled by the automatic temperature controller, and the temperature is specified and constant according to the test requirements; the water titration unit is set above the upper surface of the sample, which can precisely control the water droplets Quantitative, in order to repeat the test for a single sample at the same time, multiple continuous or movabl...

Embodiment 3

[0035] The invention discloses specific instructions for use of the device. The device disclosed by the invention can be used in the fields of material ice adhesion strength test, coating ice adhesion strength test, ice adhesion test of different shapes (smooth, rough, regular non-smooth) and related parameters, and can be used for engineering material selection and engineering anti-corrosion. Provide a reference for the research and development of icing materials, coatings, and surfaces. As a test device for the surface properties of materials, the specific operation steps of the ice adhesion strength test device disclosed in the present invention are as follows:

[0036] (1) Push the test piece 3 into the middle of the sample holder 1 and the refrigeration unit 2, and fix the test piece 3.

[0037] (2) Start the refrigeration unit 2 at the bottom of the test piece, and quickly cool the test piece 3 to reach the predetermined refrigeration temperature (according to the test ...

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Abstract

The invention relates to a method and an apparatus for testing the ice adhesion strength. The apparatus comprises parts of a sample mount, refrigeration units, a water titration unit, a sliding knife, a force sensor and the like. The method for testing the ice adhesion strength comprises the following steps: fixing a test piece to be tested on the sample mount, and refrigerating the test piece to be tested by the bottom refrigeration unit; titrating quantitative water to the surface of the test piece to be tested by a water titration device to allow water to rapidly freeze on the surface of the test piece to be tested when the temperature of the test piece to be tested achieves a preset refrigeration temperature; and parallelly trimming convex ice hulls on the surface of the test piece by the sliding knife with the force sensor, testing maximal force when ice is peeled (or ruptured), and treating the maximal force as the ice adhesion strength for characterizing the surface of a material or a coating. According to the method and the apparatus provided by the invention, the principle and the structure are simple, the operation is simple and convenient, and the tangential adhesion strength between the surface of the material (or the coating) and ice can be actually characterized; and the repetition reliability and the accuracy of tests can be guaranteed because main parameters of the freezing rule, the pattern, the experimental temperature and the like are accurately controlled.

Description

technical field [0001] The invention relates to a method for testing the ice adhesion strength on the surface of a material (coating) and a matching testing device. This measurement method and device can be used to evaluate the anti-frosting and icing capabilities of different materials, coatings and surface forms (smooth, rough or regular non-smooth), and has a reference for the design and processing of working parts in low-temperature and high-humidity environments significance. Background technique [0002] Frosting and icing on the surface is a special adhesion phenomenon caused by the existence of moisture in a low-temperature environment. Icing on power transmission and transformation facilities in winter, frosting on automobile glass, snow and frost on building curtain walls, and communication equipment Snow on the surface (such as satellite antennas), icing on the wings of aircraft flying at high altitudes, and frosting on the cooling surface of refrigeration equipm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04
Inventor 金敬福曹敏汝绍锋汲静静丛茜
Owner JILIN UNIV
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