JPH0656354B2 - Hydrostatic test method - Google Patents

Hydrostatic test method

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Publication number
JPH0656354B2
JPH0656354B2 JP26542085A JP26542085A JPH0656354B2 JP H0656354 B2 JPH0656354 B2 JP H0656354B2 JP 26542085 A JP26542085 A JP 26542085A JP 26542085 A JP26542085 A JP 26542085A JP H0656354 B2 JPH0656354 B2 JP H0656354B2
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JP
Japan
Prior art keywords
nitrite
rust
test
ammonium carbonate
000ppm
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
Application number
JP26542085A
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Japanese (ja)
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JPS62124435A (en
Inventor
勉 松下
Original Assignee
三菱重工業株式会社
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Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to JP26542085A priority Critical patent/JPH0656354B2/en
Publication of JPS62124435A publication Critical patent/JPS62124435A/en
Publication of JPH0656354B2 publication Critical patent/JPH0656354B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えば鉄鋼製の各種タンク、圧力容器等の水圧試験とその後における容器内面の防錆効果を向上させる水圧試験方法に関する。 DETAILED DESCRIPTION OF THE INVENTION The present invention [relates], for example iron or steel various tanks, relates hydraulic test method for improving the corrosion protection of the inner surface of the container in a subsequent and pressure test such as a pressure vessel.

〔従来の技術〕 [Prior art]

鉄鋼製のタンク、圧力容器の水圧試験に際しては、水圧水が注入され、試験を行う期間あるいは、試験が終了して水圧水を排出した後の期間について器内の発錆を防止,抑制するため、通常は水圧水に予め防錆剤を添加するものである。 Iron or steel tank, during hydrostatic testing of pressure vessels, pressure water is injected, the period perform the test or prevent rusting in the vessel for the period after the test was discharged pressure water exit, to suppress usually it is to add pre-rust agent to the water pressure water. 防錆剤の組成は、亜硝酸塩,りん酸塩, The composition of the rust inhibitor is nitrite, phosphate,
カルボン酸塩等が多用されている。 Carboxylic acid salts is frequently used. 水溶性防錆剤の一般的性能は、その水溶液に鉄などの表面が浸漬されている時に最もその効果を発揮するもので、一旦その水溶液からひきあげた状態では、時間の経過とともにその効果は減退していくものである。 General performance of the water-soluble anticorrosive agent is intended to exert most its effect when the surface of the iron are immersed in the aqueous solution, in the state in which once lifted from the aqueous solution, the effect is diminished with the passage of time it is intended to continue to.

タンクや圧力容器の水圧試験においては、水圧水を注入するとき、補修等で漲水した水を一時排出するとき、あるいは、容器の半分まで水を注入して空気圧をかけるなどタンク、圧力容器の内面は様々な雰囲気,環境にさらされる訳であるが、先述したように非接液部の発錆は防止することが困難な状態である。 In hydrostatic testing of tanks and pressure vessels, when injecting water pressure water, when discharged temporarily Minagimizu water in repairing etc., or the like by injecting water to half of the container applying a pressure tank, the pressure vessel inner surface various atmosphere, but always exposed to the environment, rusting of Hise' liquid portion as previously described is a difficult state to be prevented.

われわれは先に炭酸のアンモニウム塩を水溶液として水圧水に使用すれば接液部は勿論、その気化性防錆力のために非接液部迄も防錆可能であることを提案した。 It proposed that previously wetted parts Using water pressure water ammonium salt as an aqueous solution of carbonic acid, of course, until the Hise' liquid portion because of its volatile corrosion strength can also be rust. このような非接液部迄の効果を発揮するためには比較的低濃度でも可能であるが、接液部の平滑一般部は良好であっても隙間部,溶接部,他の部材との接触部などの完全防錆には相当の高濃度を添加しないと達成できないことが判明した。 Although in order to be effective up to such non-wetted parts are possible at relatively low concentrations, smoothing the general portion gap portion even better wetted parts, welds, with other members completely rust, such as the contact portion has been found that not be achieved unless the addition of high concentrations of equivalent.

〔発明が解決しようとする問題点〕 [Problems to be Solved by the Invention]

通常、他の部材との接触部,隙間部等は酸素電解質等の不均一が生じやすいため濃淡電池作用によって腐食が進行するが、金属の材種によっても差異がある。 Usually, the contact portion with other members, clearance, etc. are corroded by the concentration cell effect because unevenness tends to occur such as oxygen electrolyte progresses, there is a difference by grades of metal. 炭酸アンモニウムの1,000ppmはSS41材を確実に防食するが、 1,000ppm of ammonium carbonate is reliably anticorrosion the SS41 material,
STB35材は5,000ppmでも隙間部の発錆を抑えることができない。 STB35 material can not suppress the rust of clearance even 5,000ppm. 一方、密封容器においてその容積の半量の水を入れた場合、炭酸アンモニウムの3,000ppmを添加しておれば水と接触しない非溶接部も炭酸アンモニウムの気化ガスによって防錆することが可能である。 On the other hand, when containing water of half of its volume in a sealed container, the non-weld portion which does not contact with water is also possible to rust by vaporized gas of ammonium carbonate if I was added to 3,000ppm of ammonium carbonate.

本発明は上記の事情に鑑みてなされたもので、水圧水との接液部、特に他の部材との接触部,隙間部の防錆と、 The present invention has been made in view of the above circumstances, wetted parts of the water pressure water, in particular the contact portion with other members, and rust of the gap portion,
非接液部の防錆を十分に行い得る水圧試験方法を提供するものである。 Rust of non-wetted portion is intended to provide a water pressure test method that can sufficiently perform.

〔問題点を解決するための手段〕 [Means for Solving the Problems]

本発明は水圧水浸漬中のすき間部、他の部材との接触部の十分な防錆を達成するために炭酸アンモニウム塩と亜硝酸塩を混合して水圧水として使用する水圧試験方法である。 The present invention is a hydrostatic test method used gap portion in the pressure water immersion, a mixture of ammonium carbonate and nitrite to achieve adequate rust of the contact portion with other members as a water pressure water. 亜硝酸塩の添加量は材種によって相違するが例えば200ppmが存在すれば有効である。 Amount of nitrite is useful if there is but differs example 200ppm by grade. 炭酸アンモニウム塩としては例えば(NH 4 ) 2 CO 3 ,(NH 4 ) 2 CO 3・NH 4 HCO 3 ,N The ammonium carbonate salts such as (NH 4) 2 CO 3, (NH 4) 2 CO 3 · NH 4 HCO 3, N
H 4 HCO 3等が使用できる。 H 4 HCO 3 and the like can be used.

又、亜硝酸塩としては亜硝酸アンモニウム,亜硝酸ナトリウム,亜硝酸カリウム等が使用できる。 Also, ammonium nitrate as the nitrite nitrite, sodium nitrite, potassium nitrite or the like can be used.

〔作 用〕 [For work]

炭酸アンモニウム塩3,000ppmを添加し、亜硝酸塩の10 Was added ammonium carbonate 3,000 ppm, nitrite 10
0ppmを添加した水圧水は接液部特に他の部材との接触部,すき間部の防錆と非接液部の十分な防錆をすることができる。 Pressure water with added 0ppm may contact portion between the liquid contact portion in particular other member, a sufficient rust rust and non-wetted part of the gap portion.

〔実施例〕 〔Example〕

以下本発明方法の実施例について説明する。 It is described the following examples the present invention method.

第1図及び第2図は上記実施例で使用した試験片を示すもので、第1図は試験片の縦断面側面図、第2図は試験片の平面図である。 FIGS. 1 and 2 is intended to show a test piece used in the above embodiments, longitudinal sectional side view of FIG. 1 is a test piece, FIG. 2 is a plan view of the test piece.

図において、1は80×80×80mmの炭素鋼鋼板(JI In the figure, 1 is 80 × 80 × 80 mm carbon steel steel (JI
S G 3118中・常温圧力容器用炭素鋼鋼板SGV42 S in G 3118 · cold pressure vessel carbon steel steel SGV42
材)である。 It is a wood). この鋼板1の中央に直径19.4mmの穴加工を行い、これに外径19mm長さ280mmの炭素鋼鋼管2 Central to perform hole drilling diameter 19.4mm of the steel plate 1, to which carbon steel pipe having an outer diameter of 19mm length 280 mm 2
(JIS G 3461ボイラ・熱交換器用炭素鋼鋼管STB (JIS G 3461 boiler heat exchanger carbon steel pipe STB
35材)を挿入し鋼板1の穴と管2の外面との隙間が0. Gap 35 material) the inserted steel plate 1 hole and the pipe 2 of the outer surface 0.
2mmになるよう点溶接3で固定する。 Fixed at such point welding 3 becomes 2 mm. このようにして製作したものを隙間Sを有する試験片Tとする。 Those manufactured in this way and the test piece T having a clearance S. 次にこの試験片Tを底辺を炭素鋼(SGV42材)で封じてある内径94.6mm,高さ550mmの炭素鋼鋼管(STB35材)よりなる試験容器の底面に第1図の状態で載置し、試験容器のほぼ200mmの高さまで試験液を入れて試験容器上端をビニルシートで密封し5日間常温で室内に放置した。 Then placed in a state of FIG. 1 to the bottom of the test vessel made of carbon steel bottom of the test piece T inside diameter are sealed with (SGV42 material) 94.6Mm, carbon steel pipe (STB 35 material) Height 550mm and the test container upper end almost put to a height test liquid 200mm of the test container was left in a room with a sealed 5 days room temperature vinyl sheet.

ひきあげて点溶接を外し隙間部の発錆状況を観察し、管内面及び試験容器内面の状況観察結果とともに表1に示した。 Pulled welded to observe rust status of clearance off points are shown in Table 1 together with the status observations luminal surface and the test vessel inner surface.

この実施例において試験液として、炭酸アンモニウム2, As a test solution in this example, ammonium carbonate 2,
000ppmと亜硝酸ナトリウム100ppmもしくは200pp 000ppm and sodium nitrite 100ppm or 200pp
m、炭酸アンモニウム2,000ppmと亜硝酸アンモニウム1 m, ammonium carbonate 2,000ppm and ammonium nitrite 1
00ppmもしくは200ppm、炭酸アンモニウム3,000ppm 00ppm or 200 ppm, ammonium carbonate 3,000ppm
と亜硝酸ナトリウム100ppm、炭酸アンモニウム3,000 When sodium nitrite 100 ppm, ammonium carbonate 3000
ppmと亜硝酸アンモニウム100ppm、炭酸アンモニウム ppm and ammonium nitrite 100ppm, ammonium carbonate
5,000ppmと亜硝酸ナトリウム80ppm、炭酸アンモニウム5,000ppmと亜硝酸アンモニウム80ppmを用い、一方、比較例の試験液として、炭酸アンモニウム1,000pp 5,000ppm sodium nitrite 80 ppm, ammonium carbonate 5,000ppm and ammonium nitrite 80 ppm, whereas, as a test solution of Comparative Example, ammonium carbonate 1,000pp
m,3,000ppm,5,000ppm、亜硝酸ナトリウム1,000ppm, m, 3,000ppm, 5,000ppm, sodium nitrite 1,000ppm,
亜硝酸アンモニウム1,000ppmを用いた。 Using ammonium nitrite 1,000ppm.

表1の結果に示すとおり、炭酸アンモニウム塩として例えば炭酸アンモニウムの5,000ppmで浸漬した隙間部を除く接液部と非接液部は防錆されているが、試験片Tの隙間部は防錆できない。 As shown in the results of Table 1, the liquid contact portion and the non-wetted parts except the soaked gap portion at 5,000ppm for example ammonium carbonate as carbonate salts are rust, but the gap portion of the test piece T rust Can not. しかし、亜硝酸塩として例えば亜硝酸アンモニウム、又は亜硝酸ナトリウムを100ppm However, nitrite as for example ammonium nitrite or sodium nitrite 100ppm
添加すれば、炭酸アンモニウムを3,000ppmに低減しても容器内の全部位が確実に防錆される。 Be added, all sites within the container is reliably rust be reduced ammonium carbonate 3,000 ppm.

亜硝酸アンモニウム,亜硝酸ナトリウムは1,000ppmで浸漬面の防錆は可能であるが非接液部は全面腐食する。 Ammonium nitrite, sodium nitrite is susceptible rust dipping plane is 1,000ppm non wetted parts are corrosion.

〔発明の効果〕 以上述べたように本発明によれば、炭酸アンモニウム塩の気化防錆力の特徴を十分に利用し、性能不足を呈する浸漬部の防錆力を少量の亜硝酸塩を添加することによって補強し相乗効果を利用すれば鉄鋼製のタンクおよび圧力容器の耐圧試験時とそれ以後の多様な雰囲気における内面の防錆が確実に達成できる。 According to the present invention as described above [Effect of the Invention, the characteristics of the vaporization rust prevention ammonium carbonate salt utilizing well, adding a small amount of nitrite antirust force of the submerged portion exhibiting poor performance rust of the inner surface at the pressure test during a subsequent diverse atmosphere of iron or steel tanks and pressure vessels by utilizing a synergistic effect reinforcing can be reliably achieved by.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

第1図は本発明の実施例で用いた試験片の一例を示す縦断側面図、第2図は同じく平面図である。 Longitudinal side view showing an example of a test piece used in the embodiment of Figure 1 the present invention, FIG. 2 is a plan view of the same. 1……炭素鋼鋼板、2……炭素鋼鋼管、3……点溶接、 1 ...... carbon steel steel, 2 ...... carbon steel pipe, 3 ...... point welding,
T……試験片、S……隙間。 T ...... test piece, S ...... gap.

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】炭酸アンモニウム塩と亜硝酸塩を添加した水溶液を水圧水として使用することを特徴とする水圧試験方法。 1. A hydraulic test method characterized by using an aqueous solution prepared by adding ammonium carbonate and nitrite as pressure water.
JP26542085A 1985-11-26 1985-11-26 Hydrostatic test method Expired - Lifetime JPH0656354B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26542085A JPH0656354B2 (en) 1985-11-26 1985-11-26 Hydrostatic test method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26542085A JPH0656354B2 (en) 1985-11-26 1985-11-26 Hydrostatic test method

Publications (2)

Publication Number Publication Date
JPS62124435A JPS62124435A (en) 1987-06-05
JPH0656354B2 true JPH0656354B2 (en) 1994-07-27

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ID=17416908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26542085A Expired - Lifetime JPH0656354B2 (en) 1985-11-26 1985-11-26 Hydrostatic test method

Country Status (1)

Country Link
JP (1) JPH0656354B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010027707A2 (en) * 2008-08-28 2010-03-11 Basf Corporation Hydraulic fluid and method of preventing vapor corrosion

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Publication number Publication date
JPS62124435A (en) 1987-06-05

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