JPS58210173A - Corrosion inhibiting composition - Google Patents
Corrosion inhibiting compositionInfo
- Publication number
- JPS58210173A JPS58210173A JP57093005A JP9300582A JPS58210173A JP S58210173 A JPS58210173 A JP S58210173A JP 57093005 A JP57093005 A JP 57093005A JP 9300582 A JP9300582 A JP 9300582A JP S58210173 A JPS58210173 A JP S58210173A
- Authority
- JP
- Japan
- Prior art keywords
- soln
- lithium
- polyhydric alcohol
- water
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/141—Amines; Quaternary ammonium compounds
Abstract
Description
【発明の詳細な説明】
本発明は水酸化リチウム含有臭化リチウム水浴液組成物
、特に吸収式冷凍機等に用いられる水酸化リチウム含有
臭化リチウム水溶液の金属腐蝕性を効果的に抑止する添
加物と水酸化リチウムａ有臭化リチウム水溶液とよりな
る新規な腐蝕抑止組成物に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an additive that effectively inhibits metal corrosion in a lithium bromide aqueous solution containing lithium hydroxide, particularly in an aqueous lithium bromide solution containing lithium hydroxide used in an absorption refrigerator, etc. The present invention relates to a novel corrosion inhibiting composition comprising an aqueous solution of lithium hydroxide and lithium bromide.
臭化リチウム水溶液は軟鋼、銅、黄銅等に灼する腐蝕性
を持つことは良く知られており、これら金属旧材が吸収
式冷凍機ＶＣ用いられ、その吸収液として臭化リチウム
水溶液が使用される場合はその腐蝕抑止剤として各種の
ものが提案され、そのうちいくつかのものは実際の使用
に供されている。It is well known that lithium bromide aqueous solution has caustic and corrosive properties to mild steel, copper, brass, etc., and these old metal materials are used in absorption refrigerators (VC), and lithium bromide aqueous solution is used as the absorption liquid. Various types of corrosion inhibitors have been proposed for corrosion inhibitors, some of which are in actual use.
例えば、モリブデン酸リチウム、クロム酸リチウム、硝
酸リチウム等の硝酸塩、リン酸リチウム、ホウ酸リチウ
ム、過塩素酸リチウム、タングステン酸リチウム、バナ
ジン酸リチウム、チオシアノ酸リチウム、ケイフッ化リ
チウム、叱硝酸リチウム、ジフェニルグアニジン、メル
カプトベンゾチアゾール、ベンゾトリアゾール、ベンゾ
トリアゾールとモリブデン酸塩、アルカノールアミンモ
ジくは硝酸塩との混合物の他、これらのうちの一部に更
に水酸化リチウム等が加えられたもの、水酸化リチウム
を単独で添加したもの等が列挙される。For example, nitrates such as lithium molybdate, lithium chromate, lithium nitrate, lithium phosphate, lithium borate, lithium perchlorate, lithium tungstate, lithium vanadate, lithium thiocyanate, lithium silicofluoride, lithium scolded nitrate, diphenyl In addition to guanidine, mercaptobenzothiazole, benzotriazole, mixtures of benzotriazole with molybdates, alkanolamine modules, or nitrates, lithium hydroxide etc. are added to some of these, and lithium hydroxide. Those added alone are listed.
しかし、従来のこれら添加剤は具化リチウム水浴液の全
面腐蝕防止の点では効果があるものの。However, although these conventional additives are effective in preventing the entire surface of the embodied lithium water bath solution from corrosion.
種々の欠点を有している。例えば、クロム酸塩、モリブ
デン酸塩、硝酸塩、亜硝酸リチウム等ｉｔ陣間腐゛蝕現
象を起こす他それ自体、還元されて消耗がはけしいので
管理が煩雑であり、ベンゾトリアゾールは臭化リチウム
水溶液への溶解性に難があり、ベンゾトリアゾール又は
その誘導体とモリブデン酸塩と水酸化リチウムとの混合
物を添加した場合は高温での防蝕性に欠ける。水酸化リ
チウムの徐加も防蝕性は不充分である。It has various drawbacks. For example, chromates, molybdates, nitrates, lithium nitrite, etc. cause interstitial corrosion and are themselves reduced and rapidly consumed, making management complicated. It has poor solubility in aqueous solutions, and when a mixture of benzotriazole or its derivatives, molybdate, and lithium hydroxide is added, it lacks corrosion protection at high temperatures. The gradual addition of lithium hydroxide also provides insufficient corrosion protection.
本発明者等はこれらの欠点を解決すべく検討した結果、
水酸化リチウム含有臭化リチウム水溶液に少なくとも３
価以上の水溶液脂肪族多価アルコールを添加した組盛物
が好適であること、史に、該多価アルコールを水酸化リ
チウム含有臭化リチウム水溶液に対して０．０２〜１．
０重量％添加した組成物が特に秀れていることを見出し
１本発明を完成した。As a result of the inventors' studies to solve these drawbacks,
At least 3% of lithium bromide aqueous solution containing lithium hydroxide
It is preferable to use a composition in which an aqueous aliphatic polyhydric alcohol having a valence of 0.02 to 1.
The present invention was completed by discovering that a composition containing 0% by weight is particularly excellent.
以下、本発明を更に詳しく説明する。The present invention will be explained in more detail below.
本発明に係る組成物を構成する水酸化リチウム含有臭化
リチウム水溶液は通常用いられている５Ｊ〜５５ｋＶ％
臭化リチウム水浴液１−Ｃ水酸化リチウムが加えられ０
．０１〜０３０重ｈｉ ％の水酸化リチウム濃度に調整
される、。The lithium bromide aqueous solution containing lithium hydroxide constituting the composition according to the present invention is a commonly used 5J to 55kV%
Lithium bromide water bath solution 1-C lithium hydroxide is added and 0
．． The lithium hydroxide concentration is adjusted to 01-030% by weight.
また、他の構成成分の多価アルコールは少なくとも３価
以上の水溶性脂肪族多価アルコールを指し、鎖式、演武
を問わない１．またこれらは吸収液の商品としてのびｆ
、 ｊｔＴ１時の取扱い易さの点で常温ないし４０℃近
辺で具化リチウト水浴液に溶解性があればよい。一度は
特ＶＣ限定されるものではないが、水酸化リチウム含有
臭化リチウム水溶液にｈ）し微脣に過ぎては効果は期待
できなく、少なくとも００２重量％添加することが好ま
しい１．また、逆に多すぎる場合はその種類によっては
水浴性に差が出る他、本発明の効果の点において顕著性
が出なくなるため、水酸化リチウム含有鈍化リチウム水
浴故に対してせいぜい１．０重量多加えれば充分である
１、添加にの好ましい範囲は上記の通りであるが、臭化
リチウムの腐蝕抑１１効果の点で特に１効果的な範囲は
０１〜０５重Ｍ％である１、なお、上記のごとく脂肪族
多価アルコールは水浴性である必°鯰から分る鯖は通常
１，０００を超えては好ましくない。In addition, the polyhydric alcohol as another component refers to a water-soluble aliphatic polyhydric alcohol with at least trivalent or higher valence, regardless of chain type or performance. These products are also available as absorption liquid products.
, In terms of ease of handling during T1, it is sufficient that the embodied lithium is soluble in the water bath solution at room temperature to around 40°C. Although there is no particular limitation on VC, if it is added to a lithium bromide aqueous solution containing lithium hydroxide, no effect can be expected if it is added too slightly, so it is preferable to add at least 0.02% by weight.1. On the other hand, if the amount is too large, there will be a difference in water bath properties depending on the type, and the effect of the present invention will not be significant, so it is necessary to increase the amount by at most 1.0 weight for a blunted lithium water bath containing lithium hydroxide. It is sufficient to add 1. The preferred range for addition is as described above, but in terms of the corrosion inhibiting effect of lithium bromide, 1 is particularly effective in the range of 01 to 05% by weight1. As mentioned above, aliphatic polyhydric alcohols must be water-bathable, and it is usually not preferable to use more than 1,000 in the case of mackerel.
本発明にいう水溶性脂肪族多価アルコールは、３価以−
トのアルコールでなければ効果を発揮、しない。しかも
これらアルコール基はすべて遊離アルコールでなければ
ならずエステル化とかエーテル化とかの誘導体では効果
がない。しかし、立１４１′！ｖ造トのアルコール基の
位置関係は問題にならない。The water-soluble aliphatic polyhydric alcohol referred to in the present invention is trihydric or more.
It will not be effective unless it is alcoholic. Furthermore, all of these alcohol groups must be free alcohols, and esterified or etherified derivatives are ineffective. However, standing 141′! The positional relationship of the alcohol groups in the preparation does not matter.
また、水浴性脂肪族多価アルコールの脂肪族基は飽■１
、不飽和を問わない。In addition, the aliphatic group of the water bathable aliphatic polyhydric alcohol is
, whether unsaturated or not.
本発明の組成物に用いられる水溶性脂肪族多価アルコー
ルの例としては、
グリセリン
ポリグリセリン
１．２．３−ブタントリオール
１．２．４−ブタントリオール
１．２．３−ペンタントリオール
３−オキシメチル−１，５ベンタンジオールエリトリツ
ト
アラビノース、グルコース等のアルドース（環状も含む
）
等があげられる。Examples of water-soluble aliphatic polyhydric alcohols used in the composition of the present invention include: glycerin polyglycerin 1. 2.3-butanetriol 1. 2.4-butanetriol 1. 2.3-pentanetriol 3-oxy Examples include methyl-1,5-bentanediol erythritol arabinose, aldoses (including cyclic ones) such as glucose, and the like.
本発明における水酸化リチウム含有の効果が東北リチウ
ムのみの場合に比べて秀れていることは従来から知られ
ている通りであるが、本発明においては１）Ｉ■記のご
とく臭化リチウム５３〜５５重−係、水酸化リチウム０
．０１〜０．３ Ｉ（ｊ ｉｌｉ′％からなる水浴を夜
が用いられている。。It has been known that the effect of containing lithium hydroxide in the present invention is superior to that in the case of Tohoku lithium alone, but in the present invention, 1) Lithium bromide 53 as described in I ~55 heavy weight, lithium hydroxide 0
．． A water bath consisting of 01-0.3 I (j ili'%) is used at night.
次Ｖζ本発明に係る組成物金柑いた実施例について説明
する。Next, an example in which the composition according to the present invention was prepared using kumquats will be described.
実施例１〜８、比較例１〜４
実施の効果は、腐蝕減ＩＩｉ及び隙間腐蝕の有無の測定
により判断した、。Examples 1 to 8, Comparative Examples 1 to 4 The effects of the implementation were determined by measuring the corrosion reduction IIi and the presence or absence of crevice corrosion.
これらの具体的測定）ｊ法について説明する５、腐蝕減
Ｉ−は水酸化リチウムを０．１重量％、臭化リチウム５
５重酸チ含有する水Ｉ６液に、水浴性脂肪族多価アルコ
ールを添加した水浴液を水蒸気コンデンサー付加熱用フ
ラスコ中に入れ、（たて）５゜α×（よこ）３．０ｃｒ
ｎ×（厚さ）０２ｍの２３２７のＳＳ＊４１材で、吊り
下げ用孔を持つ平板を工メリー紙でよく研磨し、且つ脱
脂処理をした２枚を隔離して吊り下げ、１，０００時間
煮沸浸漬処理をし、その重量減により判断した。These specific measurements) J method will be explained 5. Corrosion reduction I- is 0.1% by weight of lithium hydroxide, 5% of lithium bromide.
A water bath solution obtained by adding a water bath aliphatic polyhydric alcohol to a water I6 solution containing pentahydric acid was placed in a steam condenser heating flask, and the mixture was heated to 5° α (vertical) x 3.0 cr (horizontal).
Made of 2327 SS*41 material of n x (thickness) 02m, a flat plate with a hole for hanging was well polished with machined merry paper, and the two degreased plates were separated and hung for 1,000 hours. It was subjected to boiling immersion treatment and judged based on the weight loss.
呼だ、隙間腐蝕の発生の有無は、前記腐餉減曽測定に供
したものと同組成の水溶液を、同様のフラスコ中に入れ
、（たて）３−Ｏｃｍ×（よこ）２０ｃｍ ×（厚み）
０．２ｔＭのｓｓ笥４１材平板でエメリー紙でよく研磨
し脱脂処理をしたものにシリコーンゴム製輪ゴム（巾（
Ｌ ５ （ｍ、折り径１−５ ｃｍ ） ｔ：よこ方向
に２本、掛けたものを浸漬し、１，０００時間煮沸処理
をして後、輪ゴムで被覆されていた部分の表面腐蝕の発
生の有無により判定した。To check for the occurrence of crevice corrosion, place an aqueous solution with the same composition as that used for the corrosion reduction measurement in the same flask and measure 3-Ocm (vertical) x 20cm (horizontal) x (thickness). )
A silicone rubber band (width (
L 5 (m, folding diameter 1-5 cm) T: After immersing two pieces hung horizontally and boiling them for 1,000 hours, surface corrosion occurred on the part covered with the rubber band. Judgment was made based on the presence or absence of
第１表には、水浴液組成と測定した本発明の効＋４８：
を／Ｆした。Table 1 shows the water bath liquid composition and the measured effectiveness of the present invention +48:
I did /F.
第 １ 表
＊ｌ 分子計約５００で１０％水４７１（で添加した＊
２５５重量％のＬｉＢｒ水浴液にＬｉ０ＩＩが０１重量
％添加された水溶液への添加量
但し、比較例は５５重”ｖｔｒ％のＩ、ｉＨｒ水溶液へ
の添加量
以にの結果から明らかなごとく３価以上のｌ１ｋＮ＋性
脂肪族多価アルコール
臭化リチウム水溶液の腐蝕性抑止に′４Ｆ．常に効果的
であることがわかる。Table 1 *l Molecular meter approx. 500 and 10% water added at 471 (*
The amount added to the aqueous solution in which 0.1 wt % of Li0II was added to the 255 wt % LiBr water bath solution. It can be seen that the above l1kN+ aliphatic polyhydric alcohol '4F.' is always effective in suppressing the corrosiveness of the aqueous solution of lithium bromide.
％π１−出願人 昭和電工株式会Ｆ．１代 理 人
菊 地 精 −一二%π1 - Applicant Showa Denko Co., Ltd. F. 1st Director: Sei Kikuchi -12
Claims (1)
なくとも３価以上の水溶性脂肪族多価アルコールを添加
してなる腐蝕抑止組成物 （２）水溶性脂肪族多価アルコールを水酸化リチウム含
有臭化リチウム水浴液に対して０．０２ないし１．０重
量％添加してなる特許請求の範囲第１項記載の腐蝕抑止
組成物 （３）水溶性脂肪族多価アルコールの分子量が１．００
０１超えることはない特許請求の範囲第１」ｎ記載の腐
蝕抑止組成物[Scope of Claims] +1) A corrosion-inhibiting composition obtained by adding at least a trihydric or higher water-soluble aliphatic polyhydric alcohol to a lithium bromide aqueous solution containing lithium hydroxide. Corrosion inhibiting composition (3) according to claim 1, which is added in an amount of 0.02 to 1.0% by weight to a lithium bromide water bath solution containing lithium oxide, wherein the molecular weight of the water-soluble aliphatic polyhydric alcohol is 1.00
01 Corrosion inhibiting composition according to claim 1'n, not exceeding
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57093005A JPS58210173A (en) | 1982-06-02 | 1982-06-02 | Corrosion inhibiting composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57093005A JPS58210173A (en) | 1982-06-02 | 1982-06-02 | Corrosion inhibiting composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58210173A true JPS58210173A (en) | 1983-12-07 |
Family
ID=14070262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57093005A Pending JPS58210173A (en) | 1982-06-02 | 1982-06-02 | Corrosion inhibiting composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58210173A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004143265A (en) * | 2002-10-23 | 2004-05-20 | Toyota Motor Corp | Cooling liquid, method for sealing cooling liquid and cooling system |
-
1982
- 1982-06-02 JP JP57093005A patent/JPS58210173A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004143265A (en) * | 2002-10-23 | 2004-05-20 | Toyota Motor Corp | Cooling liquid, method for sealing cooling liquid and cooling system |
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