JPH0557543B2 - - Google Patents
Info
- Publication number
- JPH0557543B2 JPH0557543B2 JP15943887A JP15943887A JPH0557543B2 JP H0557543 B2 JPH0557543 B2 JP H0557543B2 JP 15943887 A JP15943887 A JP 15943887A JP 15943887 A JP15943887 A JP 15943887A JP H0557543 B2 JPH0557543 B2 JP H0557543B2
- Authority
- JP
- Japan
- Prior art keywords
- polyglycerin
- couplant
- waves
- ultrasonic
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009659 non-destructive testing Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 235000011187 glycerol Nutrition 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- -1 fatty acid esters Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229940105990 diglycerin Drugs 0.000 description 1
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 235000012907 honey Nutrition 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 229920000223 polyglycerol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 238000009683 ultrasonic thickness measurement Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Description
［産業上の利用分野］
本発明は各種材料、構造物などの非破壊検査、
すなわち超音波探傷または厚さ測定や各種物性測
定用接触媒質に関する。さらに詳しくは、本発明
はポリグリセリンおよび／またはポリグリセリン
誘導体を含有する超音波透過性にすぐれ、取扱い
性の良好に超音波探傷または厚さ測定や各種物性
測定用の接触媒質に関する。
［従来の技術］
非破壊検査の一種である超音波探傷法や超音波
厚さ測定法においては、被検査試料の表面より内
部に向つて超音波パルス（縦波）を送り、界面、
傷や格子欠陥などからの反射波を受け、これを電
気信号にかえてブラウン管にうつし出し、それに
よつて試料の厚さ、内部の傷、欠陥の位置や大き
さを知ることができる。
従来は、超音波発振器の送波面および受波面と
被検査試料との間の空気間〓をなくし、受信波の
減衰率を小さくするために、油、グリセリン、水
などの接触媒質を介在させて測定を行なつてい
た。
最近では、油、水、グリセリンの欠点を改良し
たポリビニルアルコール（PVA）を主成分とす
る接触媒質やカルボキシビニルポリマーを主成分
とする接触媒質が知られている。
しかしながら、それらのいずれの接触媒質も超
音波パルス（横波（SH波）；被検査面と平行な
波）を用いたばあい、被検査面にSH波を伝達す
ることができず、鉄鋼の音響異方性、応力、弾性
係数、内部の傷、欠陥の位置や大きさなどを知る
ことができなかつた。
一部の接触媒質には、水あめやハチミツが用い
られ、SH波の伝達が試みられているが、超音波
のエコーの安定性（再現性）がなく、しかも感度
がわるく、後処理（ふきとり）がしにくく実用に
は向かないものであつた。
また、従来の媒質は、高温（250〜300℃）に耐
えることができず、溶接部の溶接直後の探傷や化
学プラントなどの稼働中における装置（表面温
度：250〜300℃）の探傷には適用することができ
なかつた。
［発明が解決しようとする問題点］
そこで本発明者らは、超音波（縦波および横波
（SH波））の透過性にすぐれた被検体物が高温で
も使用することができ、取扱い性の良好な接触媒
質、すなわち従来の縦波を利用する超音波探傷や
厚さ測定にも使用することができ、加えて横波
（SH波）を利用する鉄鋼の音響異方性、応力、弾
性係数の測定、欠陥の検出用接触媒質をうるべく
種々検討を重ねた結果、ポリグリセリンおよび／
またはポリグリセリン誘導体を含有した媒質を用
いれば、超音波（縦波および横波（SH波））透過
性にすぐれ、しかも高温（250〜300℃）にも耐
え、取扱い性も良好であるというまつたく新たな
事実を見出し、本発明を完成するにいたつた。
［問題点を解決するための手段］
すなわち、本発明はポリグリセリンおよび／ま
たはポリグリセリン誘導体からなる非破壊検査用
接触媒質ならびにポリグリセリンおよび／または
ポリグリセリン誘導体を含有する水性液からなる
非破壊検査用接触媒質に関する。
［作用および実施例］
本発明の非破壊検査用接触媒質は、ポリグリセ
リンおよび／またはポリグリセリン誘導体あるい
は該ポリグリセリンおよび／またはポリグリセリ
ン誘導体を含有する水性液からなる。
前記ポリグリセリンとしては、市販のポリグリ
セリンが好適に用いられる。その一例をあげれ
ば、一般式（）：
で表わされるポリグリセリンなどがある。なお、
一般式（）中、重合度(n)は、目的とする接触媒
質に応じて適宜調整され、本発明はかかる重合度
(n)によつて限定されるものではないが、通常、２
〜15、なかんづく４〜10であるのが好ましい。
前記ポリグリセリン誘導体としては、たとえば
前記一般式（）で表わされるポリグリセリンと
炭素数２〜20の脂肪酸とのエステル化反応によつ
てえられるポリグリセリン脂肪酸エステルなどが
あげられる。かかるポリグリセリン脂肪酸エステ
ルの具体例としては、たとえば阪本薬品工業(株)製
のポリグリセリン（商品名）MS−310、MO−
310、ML−310、MS−500、SS−500、TS−500、
MO−500、ML−500、MLW−750、MO−750、
ML−750などがあげられる。
前記ポリグリセリンおよびポリグリセリン誘導
体は、それぞれ単独でまたはこれを混合して用い
られる。前記ポリグリセリンおよびポリグリセリ
ン誘導体を混合して用いるばあい、これらの混合
比率についてはとくに限定はなく、目的とする接
触媒質に応じて適宜調整するのが好ましい。
前記ポリグリセリンおよび／またはポリグリセ
リン誘導体の配合量は目的とする接触媒質によつ
て異なるが、通常接触媒質中に40重量％以上、好
ましくは60重量％、とくに好ましくは85重量％以
上含有されるのが好ましい。
前記ポリグリセリンおよび／またはポリグリセ
リン誘導体を含有する水性液を接触媒質として用
いるばあいには、水の量は、前記ポリグリセリン
および／またはポリグリセリン誘導体100重量部
に対して５〜450重量部、好ましくは５〜150重量
部、とくに好ましくは５〜40重量部とするのがよ
い。
本発明の接触媒質には、グリセリンやジグリセ
リン、トリグリセリンなどが25重量％以下、好ま
しくは10重量％以下の範囲で含有されていてもよ
い。
また本発明の接触媒質には、さらに要すれば、
チクソトロピツク性を有する増粘剤、防錆剤、界
面活性剤、金属石ケン、金属粉、中和剤などを適
宜添加してもよい。
本発明の接触媒質の大きな特徴点は、超音波の
横波（SH波）をも伝達するという点である。こ
のことにより、今まで困難とされていた鉄鋼の音
響異方性、応力の測定、弾性係数の測定などが可
能となつた。
さらに本発明の接触媒質の別の特徴は、本来の
目的である超音波探傷（縦波）による欠陥の有
無、位置、大きさなどに対しても充分に感度よく
使用することができる。
そのほか、本発明の接触媒質は、高温（250〜
300℃）においても固化やゲル化を生じないため、
今まで表面温度が高い稼働中の装置などは停止
し、常温となつてから検査を行なつていたが、被
検体の表面温度が250〜300℃程度であれば、装置
を停止することなく、超音波（縦波、横波（SH
波））による検査を行なうことができる。
本発明のさらに別の特徴は、使用後の後処理が
きわめて簡単でウエスで拭き取るだけでよく、作
業の省力化が図れることにある。
つぎに実施例および比較例をあげて本発明の接
触媒質を説明する。
実施例１〜10および比較例１〜３
第１表に示す組成の接触媒質を調整し、感度試
験および高温試験を下記の方法に基づいて行なつ
た。その結果を第２表に示す。
（感度試験）
表面粗さ50μｍを有する厚さ13mmの鋼板（100
mm×200mm）に、接触媒質を厚さ0.3mmとなるよう
に塗布し、超音波探傷器（三菱電機(株)製のFD−
610）により感度の測定（垂直方向で5MHz）を行
なつた。
このとき、探触子は5Z10N（縦波）と5Z10N（横
波；SH波）を用いた。
評価は、超音波透過性がもつともすぐれている
とされているグリセリンを用いたばあいの底面エ
コー高さが80％になるときの感度を基準（ゼロ）
とし、同じ底面エコー高さ（80％）とするために
必要な感度（−dB）を調べた。
（高温試験）
表面粗さ50μｍを有する厚さ13mmの鋼板（100
mm×200mm）を250℃に加熱した後、接触媒質を厚
さ0.3mmとなるように塗布し、10分間加熱保持さ
せ、そのときの接触媒質の状態を調べた。
[Industrial Application Field] The present invention is applicable to non-destructive testing of various materials, structures, etc.
That is, it relates to a couplant for ultrasonic flaw detection, thickness measurement, and various physical property measurements. More specifically, the present invention relates to a couplant containing polyglycerin and/or a polyglycerin derivative, which has excellent ultrasonic transparency and is easy to handle, for ultrasonic flaw detection, thickness measurement, and various physical property measurements. [Prior art] In ultrasonic flaw detection and ultrasonic thickness measurement, which are types of non-destructive testing, ultrasonic pulses (longitudinal waves) are sent from the surface of the sample to the inside to detect interfaces,
It receives reflected waves from scratches, lattice defects, etc., converts them into electrical signals, and transmits them to a cathode ray tube. From this, it is possible to determine the thickness of the sample, internal scratches, and the location and size of defects. Conventionally, a couplant such as oil, glycerin, or water has been used to eliminate the air gap between the transmitting and receiving surfaces of an ultrasonic oscillator and the test sample and to reduce the attenuation rate of the received waves. was taking measurements. Recently, couplants mainly composed of polyvinyl alcohol (PVA) and carboxyvinyl polymers, which have improved the drawbacks of oil, water, and glycerin, have become known. However, when using any of these couplants with ultrasonic pulses (transverse waves (SH waves); waves parallel to the surface to be inspected), SH waves cannot be transmitted to the surface to be inspected, and the acoustic It was not possible to know the anisotropy, stress, elastic modulus, internal flaws, location and size of defects, etc. Some attempts have been made to transmit SH waves by using starch syrup or honey as couplants, but the ultrasonic echoes lack stability (reproducibility), have poor sensitivity, and require post-processing (wiping). It was difficult to remove and was not suitable for practical use. In addition, conventional media cannot withstand high temperatures (250 to 300°C), and cannot be used for flaw detection of welded parts immediately after welding or for testing equipment (surface temperature: 250 to 300°C) during operation such as chemical plants. could not be applied. [Problems to be Solved by the Invention] Therefore, the present inventors have developed an object to be examined that has excellent transparency for ultrasonic waves (longitudinal waves and transverse waves (SH waves)), can be used even at high temperatures, and is easy to handle. It is a good couplant, which can be used for ultrasonic flaw detection and thickness measurement using conventional longitudinal waves, as well as for measuring acoustic anisotropy, stress, and elastic modulus of steel using transverse waves (SH waves). As a result of various studies to find a couplant for measurement and defect detection, polyglycerin and/or
Alternatively, if a medium containing a polyglycerin derivative is used, it has excellent ultrasonic (longitudinal and transverse (SH) wave) permeability, can withstand high temperatures (250-300℃), and is easy to handle. We discovered new facts and completed the present invention. [Means for Solving the Problems] That is, the present invention provides a couplant for non-destructive testing consisting of polyglycerin and/or a polyglycerin derivative, and a non-destructive testing couplant consisting of an aqueous liquid containing polyglycerin and/or a polyglycerin derivative. Concerning couplants. [Function and Examples] The couplant for non-destructive testing of the present invention consists of polyglycerin and/or a polyglycerin derivative or an aqueous liquid containing the polyglycerin and/or polyglycerin derivative. As the polyglycerin, commercially available polyglycerin is suitably used. One example is the general formula (): There are polyglycerols represented by In addition,
In the general formula (), the degree of polymerization (n) is appropriately adjusted depending on the intended couplant, and the present invention covers such a degree of polymerization.
Although not limited to (n), typically 2
-15, especially preferably 4-10. Examples of the polyglycerin derivatives include polyglycerin fatty acid esters obtained by an esterification reaction between polyglycerin represented by the general formula () and a fatty acid having 2 to 20 carbon atoms. Specific examples of such polyglycerin fatty acid esters include polyglycerin (trade name) MS-310 and MO- manufactured by Sakamoto Pharmaceutical Co., Ltd.
310, ML-310, MS-500, SS-500, TS-500,
MO−500, ML−500, MLW−750, MO−750,
Examples include ML-750. The polyglycerin and polyglycerin derivatives may be used alone or in combination. When the polyglycerin and the polyglycerin derivative are mixed and used, there is no particular limitation on the mixing ratio thereof, and it is preferable to adjust the mixing ratio as appropriate depending on the target couplant. The blending amount of the polyglycerin and/or polyglycerin derivative varies depending on the target couplant, but it is usually contained in the couplant in an amount of 40% by weight or more, preferably 60% by weight, particularly preferably 85% by weight or more. is preferable. When an aqueous liquid containing the polyglycerin and/or polyglycerin derivative is used as a couplant, the amount of water is 5 to 450 parts by weight per 100 parts by weight of the polyglycerin and/or polyglycerin derivative; The amount is preferably 5 to 150 parts by weight, particularly preferably 5 to 40 parts by weight. The couplant of the present invention may contain glycerin, diglycerin, triglycerin, etc. in an amount of 25% by weight or less, preferably 10% by weight or less. In addition, the couplant of the present invention further includes, if necessary,
A thickener having thixotropic properties, a rust preventive, a surfactant, a metal soap, a metal powder, a neutralizing agent, etc. may be added as appropriate. A major feature of the couplant of the present invention is that it also transmits ultrasonic transverse waves (SH waves). This has made it possible to measure the acoustic anisotropy, stress, and elastic modulus of steel, which had been considered difficult until now. Another feature of the couplant of the present invention is that it can be used with sufficient sensitivity for detecting the presence, location, size, etc. of defects by ultrasonic flaw detection (longitudinal waves), which is the original purpose. In addition, the couplant of the present invention can be used at high temperatures (250 to
Because it does not solidify or gel even at temperatures (300℃),
Up until now, equipment that was in operation with a high surface temperature had to be shut down and tested after it had returned to room temperature.However, if the surface temperature of the object being tested is around 250 to 300°C, the equipment can be inspected without stopping the equipment. Ultrasonic waves (longitudinal waves, transverse waves (SH
Waves)) can be used for testing. Another feature of the present invention is that post-processing after use is extremely simple and requires only wiping with a waste cloth, resulting in labor savings. Next, the couplant of the present invention will be explained with reference to Examples and Comparative Examples. Examples 1 to 10 and Comparative Examples 1 to 3 Couplants having the compositions shown in Table 1 were prepared, and sensitivity tests and high temperature tests were conducted based on the following methods. The results are shown in Table 2. (Sensitivity test) A 13 mm thick steel plate with a surface roughness of 50 μm (100
mm x 200 mm) to a thickness of 0.3 mm, and an ultrasonic flaw detector (FD-
610) was used to measure the sensitivity (5 MHz in the vertical direction). At this time, the probes used were 5Z10N (longitudinal wave) and 5Z10N (transverse wave; SH wave). The evaluation is based on the sensitivity when the bottom echo height is 80% when using glycerin, which is said to have excellent ultrasound transparency (zero).
We investigated the sensitivity (-dB) required to achieve the same bottom echo height (80%). (High temperature test) A 13 mm thick steel plate with a surface roughness of 50 μm (100
mm x 200 mm) was heated to 250°C, the couplant was applied to a thickness of 0.3 mm, heated and held for 10 minutes, and the state of the couplant was examined at that time.
【表】【table】
【表】【table】
【表】【table】
【表】
第２表から明らかなごとく、本発明の接触媒質
は縦波のみならず横波（SH波）も伝えることが
でき、超音波透過性および探傷作業性にすぐれて
いる。
さらに高温においても本物質は蒸発や固化せ
ず、高温での探傷作業性にすぐれている。
［発明の効果］
本発明の接触媒質は、手動、半自動、自動の超
音波探傷ないし厚さ測定に有利に使用され、かつ
SH波を伝達することができるので、鉄鋼の音響
異方性、応力、弾性係数などを簡単に知ることが
できる。また、高温に耐えうるものであるため、
溶接部の溶接直後の探傷や稼動中の装置（表面温
度：250〜300℃）の探傷にも適用することができ
る。
さらにいかなる部所でも作業環境においても接
触媒質としてきわめてすぐれた機能を果たすもの
であり、また使用後も何ら問題を残さないもので
あるから、非破壊検査において卓抜した効果を奏
しうるものである。
さらに本発明の接触媒質は無臭であり、皮膚に
対する刺激もまつたくなく、人体に対してまつた
く無害であるから、安心して用いることができ
る。[Table] As is clear from Table 2, the couplant of the present invention can transmit not only longitudinal waves but also transverse waves (SH waves), and has excellent ultrasonic permeability and flaw detection workability. Furthermore, this material does not evaporate or solidify even at high temperatures, and has excellent flaw detection workability at high temperatures. [Effects of the Invention] The couplant of the present invention can be advantageously used in manual, semi-automatic, and automatic ultrasonic flaw detection or thickness measurement, and
Since SH waves can be transmitted, it is possible to easily learn the acoustic anisotropy, stress, elastic modulus, etc. of steel. In addition, because it can withstand high temperatures,
It can also be applied to flaw detection immediately after welding of welded parts and flaw detection of equipment in operation (surface temperature: 250 to 300°C). Furthermore, it performs an excellent function as a couplant in any part or work environment, and does not leave any problems after use, so it can be extremely effective in non-destructive testing. Further, the couplant of the present invention is odorless, does not cause irritation to the skin, and is completely harmless to the human body, so it can be used with confidence.
Claims (1)
ン誘導体からなる非破壊検査用接触媒質。 ２ ポリグリセリンおよび／またはポリグリセリ
ン誘導体を含有する水性液からなる非破壊検査用
接触媒質。[Scope of Claims] 1. A couplant for non-destructive testing comprising polyglycerin and/or a polyglycerin derivative. 2. A couplant for non-destructive testing consisting of an aqueous liquid containing polyglycerin and/or a polyglycerin derivative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15943887A JPS643558A (en) | 1987-06-25 | 1987-06-25 | Coupling medium for non-destructive inspection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15943887A JPS643558A (en) | 1987-06-25 | 1987-06-25 | Coupling medium for non-destructive inspection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS643558A JPS643558A (en) | 1989-01-09 |
| JPH0557543B2 true JPH0557543B2 (en) | 1993-08-24 |
Family
ID=15693755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15943887A Granted JPS643558A (en) | 1987-06-25 | 1987-06-25 | Coupling medium for non-destructive inspection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS643558A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4976171A (en) * | 1989-10-10 | 1990-12-11 | General Motors Corporation | Transmission shifter to operator controlled mechanism interlock |
| US5040434A (en) * | 1989-12-11 | 1991-08-20 | Chrysler Corporation | Ignition key locking device for gearshift park interlock system |
| DE4120380C2 (en) * | 1991-06-20 | 1993-10-28 | Porsche Ag | Locking device between an ignition lock and the selector lever of an automatic motor vehicle transmission |
| US5860303A (en) * | 1997-08-29 | 1999-01-19 | Teleflex Incorporated | Ignition safety interlock |
-
1987
- 1987-06-25 JP JP15943887A patent/JPS643558A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS643558A (en) | 1989-01-09 |
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