JPH0238843A - Detection of hydrogen corrosion of equipment material - Google Patents
Detection of hydrogen corrosion of equipment materialInfo
- Publication number
- JPH0238843A JPH0238843A JP18921988A JP18921988A JPH0238843A JP H0238843 A JPH0238843 A JP H0238843A JP 18921988 A JP18921988 A JP 18921988A JP 18921988 A JP18921988 A JP 18921988A JP H0238843 A JPH0238843 A JP H0238843A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen
- steel
- electrolytic
- electrolyte
- corrosion
- 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.)
- Granted
Links
- 239000001257 hydrogen Substances 0.000 title claims abstract description 68
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 68
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000000463 material Substances 0.000 title claims abstract description 44
- 230000007797 corrosion Effects 0.000 title claims abstract description 16
- 238000005260 corrosion Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000008151 electrolyte solution Substances 0.000 claims description 5
- 239000002436 steel type Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 23
- 239000010959 steel Substances 0.000 abstract description 23
- 239000003792 electrolyte Substances 0.000 abstract description 9
- 230000000593 degrading effect Effects 0.000 abstract 1
- 230000001066 destructive effect Effects 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 239000000243 solution Substances 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、石油精製、石油化学、化学、石炭液化、石炭
ガス化等の工場における高温高圧水素環境で操業される
装置材料に発生する水素侵〈従来の技術〉
化学、石油゛精製、石油化学、石炭のガス化液化工場の
高温高圧水素環境で操業される装置の鋼製の圧力容器、
配管には、使用材料の化学組成、製造条件、操業条件に
よっては、長時間の操業により材料に水素侵食が発生し
て材質が劣化することがあり、安全操業上大きな問題と
なっている。[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to hydrogen generated in equipment materials operated in high-temperature, high-pressure hydrogen environments in factories such as oil refining, petrochemical, chemical, coal liquefaction, and coal gasification. (Conventional technology) Steel pressure vessels for equipment operated in high-temperature, high-pressure hydrogen environments in chemical, petroleum refining, petrochemical, and coal gasification and liquefaction plants;
Depending on the chemical composition of the materials used, manufacturing conditions, and operating conditions, long-term operation of piping can cause hydrogen corrosion and deterioration of the material, which poses a major problem in terms of safe operation.
これは、ミクロには鋼中の炭化物と鋼中に浸入してきた
水素が反応して、粒界にメタンガス気泡を生ずる現象で
あり、マクロには、材料に特有の潜伏期の後に、急激に
靭性、延性等の機械的性質が劣化することが特徴である
。Microscopically, this is a phenomenon in which carbides in the steel react with hydrogen that has penetrated into the steel, producing methane gas bubbles at the grain boundaries, and macroscopically, after an incubation period unique to the material, the toughness rapidly increases. It is characterized by deterioration of mechanical properties such as ductility.
高温高圧水素環境で操業される圧力容器、配管の材料に
はＣｒ−ＭｏｗＩが使用されるが、その選定にあたって
は、通常、実操業における水素侵食に起因する事故等の
経験をもとに、鋼種毎に水素侵食の発生しない上限の温
度、水素圧力を規定したネルソン線図が参考にされてき
た。Cr-MowI is used as a material for pressure vessels and piping operated in high-temperature, high-pressure hydrogen environments, but when selecting it, the steel type is usually selected based on the experience of accidents caused by hydrogen corrosion in actual operations. The Nelson diagram, which defines the upper limit temperature and hydrogen pressure at which hydrogen erosion does not occur, has been used as a reference.
しかし、最近の製鋼技術の発展に伴う不純物元素の低減
、水素侵食の研究の進展により、同一鋼種のＣｒ−Ｍｏ
鋼であっても、著しく水素侵食感受性の異なる材料が製
造され始めた。 また、経済性の面からプラント類を
従来の経験を超えた長期間使用したいという気運にもか
かわらず、ネルソン線図では、安全運転のための上限の
温度５水素圧力が車−の曲線で規定されているのみで時
間の項がないこと等、不十分な点が多い。 このため、
旧来のネルソン線図によっていては、現行の材料、使用
期間等の変化に対応でき難くなっている。However, due to the reduction of impurity elements accompanying the recent development of steelmaking technology and progress in research on hydrogen corrosion, Cr-Mo
Even steels began to be produced with significantly different susceptibility to hydrogen attack. In addition, despite the desire to use plants for a longer period of time than was previously possible from an economic standpoint, the Nelson diagram states that the upper limit of temperature and hydrogen pressure for safe operation is specified by the car curve. There are many insufficiencies, such as the fact that there is no time section. For this reason,
Using the old Nelson diagram, it is difficult to respond to changes in current materials, usage periods, etc.
以上の理由により、個々の装置毎に、水素侵食の発生の
有無を検知する技術の確立が求められている。For the above reasons, there is a need to establish a technology for detecting the presence or absence of hydrogen erosion for each individual device.
従来、水素侵食の検知方法としては、特開昭６２−２２
３６６３号公報、特開昭６１−２５０４７号公報、特開
昭６０−９８３６５号公報および特開昭５８−３９９４
５号公報に開示された技術が知られている。Conventionally, a method for detecting hydrogen corrosion was disclosed in Japanese Patent Application Laid-open No. 62-22.
3663, JP 61-25047, JP 60-98365, and JP 58-3994.
A technique disclosed in Publication No. 5 is known.
〈発明が解決しようとする課題〉
上述した様に、装置材料の水素侵食の検知方法が提案さ
れている。 しかし、これらはいずれも比較的大がかり
な装置を必要としており、圧力容器、配管の検査現場で
使用するには簡便さに欠け、また経済的ではない。<Problems to be Solved by the Invention> As described above, methods for detecting hydrogen corrosion of device materials have been proposed. However, all of these require relatively large-scale equipment, and are not convenient or economical to use in inspection sites for pressure vessels and piping.
加えて、例えば特開昭６０−９８３６５号公報に開示さ
れている方法を工場の圧力容器に適用しようとした場合
、ノズル付近のように複雑な形状の部位では測定できな
いことがあるという問題がある。In addition, for example, when trying to apply the method disclosed in JP-A-60-98365 to a pressure vessel in a factory, there is a problem that measurement may not be possible in areas with complex shapes such as the vicinity of the nozzle. .
また、非破壊検査で多用されている超音波法は、装置材
料の水素侵食によって発生するメタン気泡の径が１μｍ
程度であるため、適用出来ない。In addition, the ultrasonic method, which is often used in non-destructive testing, is capable of producing methane bubbles with a diameter of 1 μm due to hydrogen erosion of equipment materials.
It cannot be applied because of the degree of
そこで、簡便で経済的な、水素侵食の発生の有無を検知
する技術の確立が切望されている。Therefore, there is a strong desire to establish a simple and economical technique for detecting the presence or absence of hydrogen erosion.
本発明は、上記の経済的、社会的要請に応じ、従来技術
の不十分な点を考慮してなされたもので、高温高圧水素
環境に長時間曝される圧力容器や配管に生じる水素侵食
の発生の有無を、？ＪＯ！に検知する方法を提供するこ
とを目的とする。The present invention has been made in response to the above-mentioned economic and social demands and in consideration of the inadequacies of the conventional technology. Does it occur? JO! The purpose is to provide a method for detecting
なお、水素侵食の簡便な検知方法として、スンプ試料の
ｗｌ寮による方法も考えられるが、この方法は装置材料
の一部を削りとる必要があり、安全性の面から適切な方
法とは言い難い。In addition, a simple method for detecting hydrogen erosion could be to use a sump sample as a WL dormitory, but this method requires scraping off a part of the device material, so it is difficult to say that it is an appropriate method from a safety standpoint. .
く課題を解決するための手段〉
水素侵食が発生している装置材料では、水素が飽和し、
また、メタン気泡が発生しているため、電解水素チャー
ジ法によって鋼中に水素を吸蔵させると、その水素は容
易にメタンガス中に遊離し、気泡の圧力を高め、装置材
料表面に膨れを生じさせる。 一方、水素侵食を受けて
いない装置材料では、水素は飽和してなく、また、メタ
ン気泡も存在しないため、吸蔵させた水素は容易には遊
離せず、従って装置材料表面に膨れは発生しない。 本
発明は、上記の知見から構成されたものである。Measures to solve the problem〉 In equipment materials where hydrogen corrosion occurs, hydrogen becomes saturated and
In addition, since methane bubbles are generated, when hydrogen is stored in steel using the electrolytic hydrogen charging method, the hydrogen is easily liberated into methane gas, increasing the pressure of the bubbles and causing swelling on the surface of the equipment material. . On the other hand, in a device material that has not undergone hydrogen attack, hydrogen is not saturated and there are no methane bubbles, so the occluded hydrogen is not easily released, and therefore no blistering occurs on the surface of the device material. The present invention is based on the above findings.
即ち、本発明は、電解水素チャージ法により、６０℃以
下の所定の電解液を用い、この電解液および鋼種に応じ
た電解電ａ密度および電解時間で装置材料の表面より強
制的に水素を吸蔵させ、装置表面の膨れの有無により、
水素侵食の発生の有無を知ることを特徴とする装置材料
の水素侵食の検出方法を提供するものである。That is, the present invention uses an electrolytic hydrogen charging method to forcibly absorb hydrogen from the surface of the device material using a predetermined electrolytic solution at a temperature of 60° C. or lower, and at an electrolytic electrode density and electrolytic time depending on the electrolytic solution and the steel type. Depending on the presence or absence of bulges on the surface of the device,
The present invention provides a method for detecting hydrogen corrosion of equipment materials, which is characterized by determining whether or not hydrogen corrosion has occurred.
以下に、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明では、電解水素チャージ法により、装置材料の表
面より強制的に水素を吸蔵させる。In the present invention, hydrogen is forcibly occluded from the surface of the device material by an electrolytic hydrogen charging method.
電解液は、通常使用されている電解液であればいずれで
もよいが、例えば、（ＮａＯＨ＋ＮａＣＮ）ｌ液、ＨＣ
Ｉ溶液、Ｎ ａＯＨ溶液、Ｈ２ＳＯａ １９液、（Ｈ２
Ｓ ０４ ＋ Ａ Ｓｔ Ｏｓ ）溶液等を用いるとよ
い。The electrolyte may be any commonly used electrolyte; for example, (NaOH+NaCN) 1 solution, HC
I solution, N aOH solution, H2SOa 19 solution, (H2
It is preferable to use a solution such as S 04 + A St Os ).
適切な電解電流密度は、電解液および鋼の種類によって
異なるが、電解液と鋼の組み合わせ毎の好ましい範囲を
第１表に示した。Appropriate electrolysis current density varies depending on the type of electrolyte and steel, but Table 1 shows the preferred range for each combination of electrolyte and steel.
各々、第１表に示した範囲外では、鋼に吸蔵させる水素
量が不適切となる。In each case, outside the ranges shown in Table 1, the amount of hydrogen to be stored in the steel becomes inappropriate.
電解液の温度は、６０℃以下であればよい。The temperature of the electrolytic solution may be 60° C. or lower.
６０℃超であると、鋼に吸蔵させる水素量が多すぎ、正
しい結果が得られない。If the temperature exceeds 60°C, the amount of hydrogen stored in the steel is too large, making it impossible to obtain correct results.
電解時間は、１時間以上が好ましい、 １時間未満で
あると、鋼に吸蔵させる水素量が足りなく、正しい結果
が得られない。The electrolysis time is preferably 1 hour or more; if it is less than 1 hour, the amount of hydrogen stored in the steel is insufficient and correct results cannot be obtained.
第 １ 表（電解電流密度） 単位：ｍＡ／ｃｍ’ 〈実施例〉 本発明を、実施例により、具体的に説明する。Table 1 (electrolytic current density) Unit: mA/cm' <Example> The present invention will be specifically explained with reference to Examples.
（実施例１）
第２表に示した条件で水素ａ露され、１４０℃にて測定
したシャルピー吸収エネルギーが′ｆＳ２表に示した値
であるＣ −１／ ２ Ｍ ｏ鋼の水素侵食材（メタン
気泡発生）および未侵食材（メタン気泡未発生）に、（
０，ｌＮＮａＯＨ＋０．ＩＮＮａＣＮ）ｉ液を用い、第
２表に示した電解電流密度で、液温２３℃で、水素を１
時間吸蔵させた。 その後、鋼材表面の膨れの発生の有
無を観察した。 結果は第２表に示した。(Example 1) Hydrogen-eroded material of C-1/2 Mo steel (exposed to hydrogen a under the conditions shown in Table 2 and whose Charpy absorbed energy measured at 140°C is the value shown in Table 'fS2) (methane bubbles generated) and uneroded material (methane bubbles not generated).
0.1NNaOH+0. Using INNaCN)i solution, hydrogen was added at 1 liter at the electrolytic current density shown in Table 2 at a solution temperature of 23°C.
It stored time. Thereafter, the presence or absence of blisters on the surface of the steel material was observed. The results are shown in Table 2.
（実施例２）
第３表に示した条件で水素暴露され、０℃にて測定した
シャルピー吸収エネルギーが第３表に示した値である２
−１／ ４ Ｃｒ −Ｉ Ｍ 。(Example 2) Hydrogen exposure was performed under the conditions shown in Table 3, and the Charpy absorbed energy measured at 0°C was the value shown in Table 3.
-1/4Cr-IM.
鋼の水素侵食材および未侵食材に、（０，ｌＮＮａＯＨ
＋０．ＩＮＮａＣＮ）溶を夜を用い、第３表に示した電
解電流密度で、液温２３℃で、水素を１時間吸蔵させた
。 その後、鋼材表面の膨れの発生の有無を観察した。(0,lNNaOH
+0. Hydrogen was occluded for 1 hour at a solution temperature of 23° C. and at the electrolytic current density shown in Table 3 using a solution of INNaCN). Thereafter, the presence or absence of blisters on the surface of the steel material was observed.
結果は第３表に示した。The results are shown in Table 3.
（実施例３）
第４表に示した条件で水素ａ露され、０℃にて測定した
シャルピー吸収エネルギーが第４表に示した値である２
・１／４Ｃｒ−ＩＭ。(Example 3) Hydrogen a was exposed under the conditions shown in Table 4, and the Charpy absorbed energy measured at 0°C was the value shown in Table 4.
・1/4Cr-IM.
鋼の水素侵食材および未侵食材に、（ＯＮＨ２Ｓｏ
４ ＋１ ００ｍｇ／ ｉ Ａ、２０． ）ｉ３
ン（（［を用い、第４表に示した電解電流密度で、液温
２３℃で、水素を１時間吸蔵させた。 その後、鋼材表
面の膨れの発生の有無を観察した。 結果は第４表に示
した。(ONH2So
4 +1 00mg/i A, 20. )i3
Hydrogen was absorbed for 1 hour at a liquid temperature of 23°C using the electrolytic current density shown in Table 4. After that, the presence or absence of blistering on the surface of the steel material was observed. The results are shown in Table 4. Shown in the table.
（実施例４）
第５表に示した条件で水素暴露され、１２０℃にて測定
したシャルピー吸収エネルギーが第５表に示した値であ
る１・１／４Ｃｒ−１／２ Ｍ Ｏｗｌの水素侵食材お
よび未侵食材に、Ｉ ＮＮａＯＨ溶液を用い、第５表に
示した電解ｉ流密環で、液温２３℃で、水素を１時間吸
蔵させた。 その後、鋼材表面の膨れの発生の有無を［
察した。 結果は第５表に示した。(Example 4) Hydrogen immersion of 1·1/4Cr-1/2 M Owl, which was exposed to hydrogen under the conditions shown in Table 5 and whose Charpy absorbed energy measured at 120°C was the value shown in Table 5. Hydrogen was occluded for 1 hour at a liquid temperature of 23° C. using an I N NaOH solution on the food material and uneroded material using the electrolytic flow tight ring shown in Table 5 at a liquid temperature of 23°C. After that, the presence or absence of blistering on the surface of the steel material [
I guessed it. The results are shown in Table 5.
（実施例５）
第６表に示した条件で水素暴露され、１２０℃にて測定
したシャルピー吸収エネルギーが第６表に示した値であ
るＩ Ｃｒ −１／ ２ Ｍ ｏ鋼の水素侵食材に、０
、 １ Ｎ Ｈ２Ｓ Ｏ４溶液を用い、第６表に示し
た電解電流密度で、液温２３℃で、水素を１時間吸蔵さ
せた。 その後、鋼材表面の膨れの発生の有無を観察し
た。 結果は第６表に示した。(Example 5) A hydrogen-eroded material of ICr-1/2Mo steel was exposed to hydrogen under the conditions shown in Table 6 and the Charpy absorbed energy measured at 120°C was the value shown in Table 6. ,0
, 1 N H2S O4 solution was used to store hydrogen at the electrolytic current density shown in Table 6 at a liquid temperature of 23° C. for 1 hour. Thereafter, the presence or absence of blisters on the surface of the steel material was observed. The results are shown in Table 6.
第２表〜第６表から明らかなように、水素未暴Ｂ（水素
暴露時間０．コントロール）に比べてシャルビー吸収エ
ネルギーが５ｋｇｆ−ｍ以上低下している水素侵食材で
は、第１表に示した電解電流密度で水素を１時間吸蔵さ
せると、鋼材表面に膨れが発生する。 しかし、電解電
流密度が第１表に示した値よりも小さいと、水素侵食材
であるにもかかわらず、鋼材表面に膨れは発生しない。As is clear from Tables 2 to 6, the hydrogen-eroded materials shown in Table 1 have Charby absorbed energy lowered by 5 kgf-m or more compared to non-hydrogen exposed B (hydrogen exposure time 0 control). When hydrogen is occluded for one hour at a certain electrolytic current density, blistering occurs on the surface of the steel material. However, if the electrolytic current density is lower than the values shown in Table 1, no blistering will occur on the surface of the steel material, even though it is a hydrogen-eroded material.
一方、水素未暴露や、水素未暴露に比べてシャルピー吸
収エネルギーの低下が５ｋｇｆ・ｍ未満の水素未侵食材
では、第１表に示した電解電流密度で水素を１時間吸蔵
させても、鋼材表面に膨れは発生しない。 しかし、電
解電流密度が第１表に示した値よりも大きいと、水素未
侵食材であるにもかかわらず鋼材表面に膨わが発生する
ため、水素銹起割れとの区別がです、水素侵食の発生の
有無を検出できない。On the other hand, for hydrogen-free materials that are not exposed to hydrogen or have a Charpy absorbed energy decrease of less than 5 kgf・m compared to materials that are not exposed to hydrogen, even if hydrogen is absorbed for 1 hour at the electrolytic current density shown in Table 1, the steel material No blistering occurs on the surface. However, if the electrolytic current density is larger than the value shown in Table 1, bulges will occur on the surface of the steel material even though it is a material that has not been eroded by hydrogen, so it is difficult to distinguish it from cracking caused by hydrogen corrosion. Unable to detect occurrence.
以上より、電解液および鋼の種類の組み合わせ毎に、適
切な電解電流密度、液温、時間で本発明の方法を行えば
、装置材料の水素侵食の発生の有無を、容易に検出する
ことができる。From the above, if the method of the present invention is performed with appropriate electrolytic current density, liquid temperature, and time for each combination of electrolyte and steel type, it is possible to easily detect whether hydrogen corrosion has occurred in the equipment material. can.
〈発明の効果〉
本発明によれば、高温高圧水素環境で操業される圧力容
器、配管等の装置材料における水素侵食の発生を、非破
壊的に、簡便に検知することがでざる。 従って、材質
劣化に起因する事故を未然に防ぐことができる等の大き
な工業的価値を有する。<Effects of the Invention> According to the present invention, it is possible to non-destructively and easily detect the occurrence of hydrogen corrosion in equipment materials such as pressure vessels and piping operated in a high-temperature, high-pressure hydrogen environment. Therefore, it has great industrial value, such as being able to prevent accidents caused by material deterioration.
Claims (1)
電解液を用い、この電解液液および鋼種に応じた電解電
流密度および電解時間で装置材料の表面より強制的に水
素を吸蔵させ、装置表面の膨れの有無により、水素侵食
の発生の有無を知ることを特徴とする装置材料の水素侵
食の検出方法。(1) Using the electrolytic hydrogen charging method, hydrogen is forcibly absorbed from the surface of the device material using a specified electrolytic solution at 60°C or less at an electrolytic current density and electrolytic time depending on the electrolytic solution and the steel type. A method for detecting hydrogen corrosion of equipment materials, characterized in that the presence or absence of hydrogen corrosion is determined by the presence or absence of surface blisters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18921988A JPH0654289B2 (en) | 1988-07-28 | 1988-07-28 | Method for detecting hydrogen erosion of equipment materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18921988A JPH0654289B2 (en) | 1988-07-28 | 1988-07-28 | Method for detecting hydrogen erosion of equipment materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0238843A true JPH0238843A (en) | 1990-02-08 |
| JPH0654289B2 JPH0654289B2 (en) | 1994-07-20 |
Family
ID=16237559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18921988A Expired - Lifetime JPH0654289B2 (en) | 1988-07-28 | 1988-07-28 | Method for detecting hydrogen erosion of equipment materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0654289B2 (en) |
Cited By (2)
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|---|---|---|---|---|
| US7552643B2 (en) | 2006-12-08 | 2009-06-30 | Centre For Nuclear Energy Research (CNER) | Device and system for corrosion detection |
| JP2017122633A (en) * | 2016-01-07 | 2017-07-13 | 新日鐵住金株式会社 | Evaluation method of hydrogen embrittlement resistance |
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-
1988
- 1988-07-28 JP JP18921988A patent/JPH0654289B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7552643B2 (en) | 2006-12-08 | 2009-06-30 | Centre For Nuclear Energy Research (CNER) | Device and system for corrosion detection |
| JP2017122633A (en) * | 2016-01-07 | 2017-07-13 | 新日鐵住金株式会社 | Evaluation method of hydrogen embrittlement resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0654289B2 (en) | 1994-07-20 |
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