CN104515476A - Corrosion depth measuring method of parts damage tolerance test - Google Patents

Abstract

The invention relates to the physical-chemistry test technology, particularly to a corrosion depth measuring method of a parts damage tolerance test. The corrosion depth measuring method includes spacedly winding the surface of a part for test with an anti-corrosion adhesive tape in a circle to form a protection tape; performing the corrosion test on the surface of the part for test; measuring a difference between a datum level before the corrosion and the minimal value after the corrosion of the surface of the part for test, to be specific, the protection taper is spaced by 10 mm.

Description

A kind of measuring method of part injury tolerance test corrosion depth

Technical field

The present invention relates to physical and chemical testing technology, particularly relate to a kind of measuring method of part injury tolerance test corrosion depth.

Background technology

Exactly the Embedded defect degree of depth is measured accurately for one important in damage tolerance test.Measure at present both at home and abroad classic method unprotect face when carrying out salt air corrosion of this depth of defect, therefore when fathoming without reference field, but measure the difference on erosional surface between top and lowest trough.In actual applications, accompany surface of test piece often corrosion-vulnerable, surface relief is uneven, and when fathoming, data error is larger.

Summary of the invention

Object of the present invention: the measuring method providing a kind of part injury tolerance test corrosion depth, can improve the accuracy that the corrosion depth in part injury tolerance test is measured.

Technical scheme of the present invention: a kind of measuring method of part injury tolerance test corrosion depth, comprising:

Wind with one circuit at equal intervals accompanying surface of test piece with anticorrosive adhesive tape, form boundary belt;

Corrosion test is carried out to the described surface of test specimen of accompanying;

Measure the reference field before accompanying surface of test piece to corrode and the difference between the rear lowest trough of corrosion.

Concrete, be spaced apart 10 millimeters between described boundary belt.

Advantage of the present invention: use this method to measure prior art cannot measure accompany surface of test piece to corrode before reference field and corrosion after difference between lowest trough, compare the method for difference between top and lowest trough on existing measurement erosional surface, the degree of depth of Embedded defect corrosion in part injury tolerance test can not only be measured, and ensure correctness and the accuracy of measurement data.

Accompanying drawing illustrates:

Fig. 1 is that the present invention accompanies test specimen to protect schematic diagram.

Fig. 2 is that the present invention fathoms schematic diagram.

Embodiment:

Below in conjunction with accompanying drawing, the present invention is elaborated.

The invention provides a kind of measuring method of part injury tolerance test corrosion depth, comprising:

S101, to wind with one circuit at equal intervals accompanying surface of test piece with anticorrosive adhesive tape, form boundary belt.

Before carrying out salt spray corrosion test, accompanying the test face of test specimen fully to expose in corrosion environment, do not do any protection, as scribbled rust preventive oil, should remove.When carrying out salt spray corrosion test, requiring to carry out surface protection to corresponding test specimen of accompanying, requiring as follows:

Wind with one circuit accompanying surface of test piece about 10mm of being often separated by with anticorrosive adhesive tape, form boundary belt.

Concrete, the trade mark using adhesive tape is 3M250, wide about 10mm.Test specimen adhesive tape is accompanied to protect form as shown in Figure 1.In Fig. 1, the black position of 1 is adhesive tape guard plot, and guard plot width is about 10mm, and interval is about 10mm.In Fig. 1,2 for accompanying test specimen matrix.

S102, corrosion test is carried out to the described surface of test specimen of accompanying.

S103, the difference measured the reference field before accompanying surface of test piece to corrode and corrode between rear lowest trough.

After accompanying test specimen to place 200 hours in salt mist environment, take out one and accompany test specimen and cut.Accompany test specimen can adopt conventional cutting mode (as Linear cut mode); test specimen will be accompanied to cut into the small sample of 4 20mm × 10mm × 15mm, make the sightingpiston of each small sample comprise protection examination face (boundary belt overlay area) not protecting examination face and 10mm × 10mm of 10mm × 10mm.Put under an optical microscope by the small sample prepared, measure by 100 times of enlargement factors, measuring method is shown in Fig. 2, and setting reference field is protection coating, measures the difference between test specimen corrosion bosom and reference field.

Use this method can not only measure the degree of depth of Embedded defect corrosion in part injury tolerance test, and ensure correctness and the accuracy of measurement data.

Claims (2)

1. a measuring method for part injury tolerance test corrosion depth, is characterized in that, comprising:

Wind with one circuit at equal intervals accompanying surface of test piece with anticorrosive adhesive tape, form boundary belt;

Corrosion test is carried out to the described surface of test specimen of accompanying;

Measure the reference field before accompanying surface of test piece to corrode and the difference between the rear lowest trough of corrosion.

2. measuring method as claimed in claim 1, is characterized in that, is spaced apart 10 millimeters between described boundary belt.