CN105021638A - Detection method for continuity of plated layer - Google Patents
Detection method for continuity of plated layer Download PDFInfo
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- CN105021638A CN105021638A CN201410160533.6A CN201410160533A CN105021638A CN 105021638 A CN105021638 A CN 105021638A CN 201410160533 A CN201410160533 A CN 201410160533A CN 105021638 A CN105021638 A CN 105021638A
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- sample
- shaped groove
- test sample
- cut
- groove mouth
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- Investigating And Analyzing Materials By Characteristic Methods (AREA)
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Abstract
The invention provides a detection method for the continuity of a plated layer. The detection method is characterized by comprising the following steps: a fatigue tensile test rod after a hydrogen brittleness measurement test is finished is parallel to the axial direction of a fatigue test rod; a test sample is cut in a manner of being vertical to a V-shaped notch; the cut test sample comprises a complete V-shaped notch; a side section with the V-shaped notch of the cut test sample is downwards arranged and is hotly embedded; the embedded test sample is wetly milled by using abrasive paper and then is polished; the polished surface is scrubbed by using wetted alcohol cotton and then is dried by blowing; the embedded test sample is corroded by using a 4% nitric acid alcohol solution and is re-corroded for about 1 minute; the corroded test sample is put into an ultrasonic cleaning instrument to be washed with a pure alcohol solution, and then is taken out to be dried by blowing; and the corroded test sample is observed by adjusting parameters of a scanning electron microscope.
Description
Technical field
The present invention relates to Physico-chemical tests method, particularly to the Physico-chemical tests method of hydrogen embrittlement performance test sample.
Background technology
In the company YG project construction manufactures, after cadmium plating titanium, the performance test of physics and chemistry hydrogen embrittlement to be carried out.After hydrogen embrittlement performance test terminates, judge that whether this test is effective, check that whether the coating at V-type notch place is continuous, then hydrogen embrittlement test is effective continuously for coating, the discontinuous then test invalidation of coating.When carrying out coating continuity test, after standard-required cutting, check under 80 to 100 times.Because cadmium plating titanium layer is softer thinner, it is very difficult that metallographic inlays sample preparation, is difficult to see continuous print coating, sometimes almost can't see coating, and cannot judge that whether hydrogen embrittlement test is effective, optical microscope detects becomes a difficult problem.
Summary of the invention
The technical problem to be solved in the present invention: the problem of the successional method for testing and analyzing of cadmium plating titanium layer.
The invention provides a kind of coating method for detecting continuity, it is characterized in that, comprise the following steps:
Tired tensile test bar after hydrogen embrittlement testing experiment terminates, be parallel to tired coupon axially, cut sample perpendicular to V-shaped groove mouth, the sample cut comprises complete V-shaped groove mouth;
By downward with the lateral section of V-shaped groove mouth for the sample cut, carry out heat and inlay;
Sample sand paper after inlaying carries out wet-milling under the water environment of flowing, uses polishing fabric and antiscuffing paste polishing thereafter on buffing machine, makes cut, dirt that test piece examine surface is observed without impact, with the alcohol swab scouring polished surface soaked, dries up;
Nital with 4% corrodes the sample after inlaying, heavy corrosion about 1 minute;
Sample after corrosion is put into the cleaning of ultrasonic washing instrument absolute alcohol solution, taking-up dries up;
By the sample after corrosion, put on the sample stage of scanning electron microscope example indoor, select high vacuum pattern, equipment automatic vacuum;
Adjustment scanning electron microscope parameter is observed the sample after corrosion;
Concrete observation procedure is: moving stage, makes sample topmost apart from electron gun lower surface 10mm, by mode adjustment to secondary electron pattern, add high pressure 20.00KV, select light beam to be φ 3.0, first enlargement factor is transferred to 50 times, adjusting focal length, adjustment brightness and contrast, make scanning electron microscope image be in clear state, then enlargement factor is transferred to 100 times, adjusting focal length, adjustment brightness and contrast, makes scanning electron microscope image be in the most clear state again;
Check all edges of V-shaped groove mouth, observe the thin layer whether having one deck continuous print brighter.There is the thin layer that continuous print is brighter, show that V-shaped groove mouth coating is continuous; There is no the thin layer that continuous print is brighter, show that V-shaped groove mouth coating is discontinuous.
Beneficial effect of the present invention:
Implemented by the method, solve the problem of coating method for detecting continuity, solve the detection difficult problem in production.
Embodiment
H201311-48X, cadmium plating titanium layer continuity after survey hydrogen embrittlement test, determines that whether this hydrogen embrittlement test is effective.
1 sampling; Tired tensile test bar after hydrogen embrittlement testing experiment terminates.
2 preparation test pieces; Be parallel to tired coupon axially, cut sample perpendicular to V-shaped groove mouth, sample contains complete V-shaped groove mouth, sample longitudinal section size 10 × 15mm; Sample, in cutting process, should prevent the phenomenons such as overheated;
Inlaying of 3 samples; By downward for the sample longitudinal section size 10 × 15mm cut, carry out heat by Q-2 pointing machine and inlay;
4 by the sample sand paper wet-milling under circulating water after inlaying, thereafter on buffing machine with polishing fabric and antiscuffing paste polishing, make cut, dirt that test piece examine surface is observed without impact;
5 clean polished surface with the alcohol swab soaked, and dry up
6 corrosion, with the nital corrosion of 4%, heavy corrosion 90 seconds.
Sample after corrosion is put into the cleaning of ultrasonic washing instrument absolute alcohol solution by 7, and taking-up dries up.
8 lay sample; By the sample prepared, put on the sample stage of scanning electron microscope example indoor;
9 scanning electron microscope vacuumize; Choose FEI-Inspect scanning electron microscope, select high vacuum pattern, equipment automatic vacuum;
10 adjustment scanning electron microscope parameters; Moving stage, makes sample topmost apart from electron gun lower surface 10mm, by mode adjustment to secondary electron pattern, add high pressure 20.00KV, select light beam to be φ 3.0, first enlargement factor is transferred to 50 times, adjusting focal length, adjustment brightness and contrast, make scanning electron microscope image be in clear state, then enlargement factor is transferred to 100 times, adjusting focal length, adjustment brightness and contrast, makes scanning electron microscope image be in the most clear state again;
11 check all edges of V-shaped groove mouth, observe the thin layer finding that all edges of V-shaped groove mouth have continuous print brighter, and prove that V-shaped groove mouth coating is continuous, this time hydrogen embrittlement test is effective.
Claims (1)
1. a coating method for detecting continuity, is characterized in that, comprises the following steps:
Tired tensile test bar after hydrogen embrittlement testing experiment terminates, be parallel to tired coupon axially, cut sample perpendicular to V-shaped groove mouth, the sample cut comprises complete V-shaped groove mouth;
By downward with the lateral section of V-shaped groove mouth for the sample cut, carry out heat and inlay;
Sample sand paper after inlaying carries out wet-milling under the water environment of flowing, uses polishing fabric and antiscuffing paste polishing thereafter on buffing machine, makes cut, dirt that test piece examine surface is observed without impact, with the alcohol swab scouring polished surface soaked, dries up;
Nital with 4% corrodes the sample after inlaying, heavy corrosion about 1 minute;
Sample after corrosion is put into the cleaning of ultrasonic washing instrument absolute alcohol solution, taking-up dries up;
By the sample after corrosion, put on the sample stage of scanning electron microscope example indoor, select high vacuum pattern, equipment automatic vacuum;
Adjustment scanning electron microscope parameter is observed the sample after corrosion;
Check all edges of V-shaped groove mouth, observe the thin layer whether having one deck continuous print brighter.There is the thin layer that continuous print is brighter, show that V-shaped groove mouth coating is continuous; There is no the thin layer that continuous print is brighter, show that V-shaped groove mouth coating is discontinuous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410160533.6A CN105021638A (en) | 2014-04-21 | 2014-04-21 | Detection method for continuity of plated layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410160533.6A CN105021638A (en) | 2014-04-21 | 2014-04-21 | Detection method for continuity of plated layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105021638A true CN105021638A (en) | 2015-11-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410160533.6A Pending CN105021638A (en) | 2014-04-21 | 2014-04-21 | Detection method for continuity of plated layer |
Country Status (1)
| Country | Link |
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| CN (1) | CN105021638A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6642518B1 (en) * | 2002-06-21 | 2003-11-04 | Texas Instruments Incorporated | Assembly and method for improved scanning electron microscope analysis of semiconductor devices |
| EP1867949A1 (en) * | 2005-09-26 | 2007-12-19 | JFE Steel Corporation | Method of measuring film thickness of surface oxide film of zinc-based plated steel sheet |
| CN101354363A (en) * | 2007-07-23 | 2009-01-28 | 比亚迪股份有限公司 | Method for measuring substrate surface coating |
| CN101608985A (en) * | 2009-07-27 | 2009-12-23 | 上海市机械制造工艺研究所有限公司 | Coating shows a display packing of etchant and multi-coated coating institutional framework |
-
2014
- 2014-04-21 CN CN201410160533.6A patent/CN105021638A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6642518B1 (en) * | 2002-06-21 | 2003-11-04 | Texas Instruments Incorporated | Assembly and method for improved scanning electron microscope analysis of semiconductor devices |
| EP1867949A1 (en) * | 2005-09-26 | 2007-12-19 | JFE Steel Corporation | Method of measuring film thickness of surface oxide film of zinc-based plated steel sheet |
| CN101354363A (en) * | 2007-07-23 | 2009-01-28 | 比亚迪股份有限公司 | Method for measuring substrate surface coating |
| CN101608985A (en) * | 2009-07-27 | 2009-12-23 | 上海市机械制造工艺研究所有限公司 | Coating shows a display packing of etchant and multi-coated coating institutional framework |
Non-Patent Citations (2)
| Title |
|---|
| 李华为: "《电镀工艺实验方法和技术》", 31 December 2006 * |
| 谭莹 等: "扫描电镜及X射线能谱仪在首饰镀层检测中的应用", 《理化检验-物理分册》 * |
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Application publication date: 20151104 |
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