JPS6345472B2 - - Google Patents
Info
- Publication number
- JPS6345472B2 JPS6345472B2 JP60245490A JP24549085A JPS6345472B2 JP S6345472 B2 JPS6345472 B2 JP S6345472B2 JP 60245490 A JP60245490 A JP 60245490A JP 24549085 A JP24549085 A JP 24549085A JP S6345472 B2 JPS6345472 B2 JP S6345472B2
- Authority
- JP
- Japan
- Prior art keywords
- acid
- corrosion
- corrosion inhibitor
- cleaning
- acids
- 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
Links
- 230000007797 corrosion Effects 0.000 claims description 46
- 238000005260 corrosion Methods 0.000 claims description 46
- 239000002253 acid Substances 0.000 claims description 43
- 239000003112 inhibitor Substances 0.000 claims description 24
- 238000004140 cleaning Methods 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 7
- JZRWCGZRTZMZEH-UHFFFAOYSA-N Thiamine Natural products CC1=C(CCO)SC=[N+]1CC1=CN=C(C)N=C1N JZRWCGZRTZMZEH-UHFFFAOYSA-N 0.000 claims description 6
- XUJNEKJLAYXESH-REOHCLBHSA-N L-Cysteine Chemical compound SC[C@H](N)C(O)=O XUJNEKJLAYXESH-REOHCLBHSA-N 0.000 claims description 5
- LEVWYRKDKASIDU-IMJSIDKUSA-N L-cystine Chemical compound [O-]C(=O)[C@@H]([NH3+])CSSC[C@H]([NH3+])C([O-])=O LEVWYRKDKASIDU-IMJSIDKUSA-N 0.000 claims description 5
- 235000001014 amino acid Nutrition 0.000 claims description 5
- 150000001413 amino acids Chemical class 0.000 claims description 5
- 235000018417 cysteine Nutrition 0.000 claims description 5
- XUJNEKJLAYXESH-UHFFFAOYSA-N cysteine Natural products SCC(N)C(O)=O XUJNEKJLAYXESH-UHFFFAOYSA-N 0.000 claims description 5
- 229960002433 cysteine Drugs 0.000 claims description 5
- 229960003067 cystine Drugs 0.000 claims description 5
- 235000019157 thiamine Nutrition 0.000 claims description 5
- 239000011721 thiamine Substances 0.000 claims description 5
- KYMBYSLLVAOCFI-UHFFFAOYSA-N thiamine Chemical compound CC1=C(CCO)SCN1CC1=CN=C(C)N=C1N KYMBYSLLVAOCFI-UHFFFAOYSA-N 0.000 claims description 4
- 229960003495 thiamine Drugs 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 239000004480 active ingredient Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 12
- 150000007513 acids Chemical class 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 235000013305 food Nutrition 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 229940024606 amino acid Drugs 0.000 description 4
- 235000013373 food additive Nutrition 0.000 description 4
- 239000002778 food additive Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KZSNJWFQEVHDMF-BYPYZUCNSA-N L-valine Chemical compound CC(C)[C@H](N)C(O)=O KZSNJWFQEVHDMF-BYPYZUCNSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 125000004434 sulfur atom Chemical group 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- AGPKZVBTJJNPAG-WHFBIAKZSA-N L-isoleucine Chemical compound CC[C@H](C)[C@H](N)C(O)=O AGPKZVBTJJNPAG-WHFBIAKZSA-N 0.000 description 1
- 229930182844 L-isoleucine Natural products 0.000 description 1
- BVHLGVCQOALMSV-JEDNCBNOSA-N L-lysine hydrochloride Chemical compound Cl.NCCCC[C@H](N)C(O)=O BVHLGVCQOALMSV-JEDNCBNOSA-N 0.000 description 1
- COLNVLDHVKWLRT-QMMMGPOBSA-N L-phenylalanine Chemical compound OC(=O)[C@@H](N)CC1=CC=CC=C1 COLNVLDHVKWLRT-QMMMGPOBSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- -1 acid cleaning Chemical class 0.000 description 1
- 229930013930 alkaloid Natural products 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229960000310 isoleucine Drugs 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- COLNVLDHVKWLRT-UHFFFAOYSA-N phenylalanine Natural products OC(=O)C(N)CC1=CC=CC=C1 COLNVLDHVKWLRT-UHFFFAOYSA-N 0.000 description 1
- 102220259718 rs34120878 Human genes 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 150000003585 thioureas Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229960004295 valine Drugs 0.000 description 1
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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
- C23G1/065—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors sulfur-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
〔産業上の利用分野〕
この発明は酸と接触する金属の腐食を防止する
ための酸用腐食抑制剤に関するものである。
〔従来の技術〕
従来鋼材、ボイラプラント等の酸洗浄には、塩
酸、クエン酸等の酸が洗浄剤として使用され、そ
の酸用腐食抑制剤としてチオ尿素類、アミン類、
アルカロイド類等が使用されている。
一方、食品製造プロセス、給湯配管、給水タン
ク等の人体に摂取される物質と接触する系の洗浄
には、洗浄剤として安全性の高い食品添加物グレ
ードの塩酸、（ポリ）リン酸、クエン酸等の酸が
使用されているが、これらの酸の腐食を防止する
安全な腐食抑制剤は知られていない。
〔発明が解決しようとする問題点〕
上記のような従来技術において、一般の酸洗浄
に使用される酸用腐食抑制剤は人体に対する害
（毒性）があるため、食品製造プロセス等の人体
に摂取される物質と接触する系の酸洗浄には使用
することができず、このような系では実質的に腐
食抑制剤の存在しない状態で酸洗浄を行わざるを
得ず、安全性および腐食抑制効果の高い酸用腐食
抑制剤が望まれている。
〔問題点を解決するための手段〕
この発明は上記のような要望に応えるためのも
ので、人体に対する安全性および腐食抑制効果の
高い食品添加物グレードの酸用腐食抑制剤を提供
することを目的としている。
この発明は、チアミン、システイン、シスチン
およびこれらの水溶性塩から成る群から選ばれる
１種以上のアミノ酸を有効成分として含有するこ
とを特徴とする酸用腐食抑制剤である。
チアミン、システインおよびシスチンは誘導体
および変性物を含む。これらの塩としては、塩酸
塩、硝酸塩、リン酸塩等の実質的に水溶性の塩が
使用できる。
これらのチアミン、システイン、シスチンおよ
びそれらの水溶性塩は、１種単独で使用してもよ
く、また２種以上を併用してもよく、さらに他の
腐食抑制剤または補助剤などと併用してもよい。
本発明の酸用腐食抑制剤が使用される酸として
は、塩酸、硫酸、硝酸、リン酸、スルフアミン酸
等の無機酸、およびクエン酸、リンゴ酸等の有機
酸がある。本発明の酸用腐食抑制剤が使用される
酸としては、食品製造プロセス、給湯装置、給水
装置等の人体に摂取される物質と接触する系の酸
洗浄、あるいは食品等の人体に接する物品の酸洗
浄の洗浄液としての酸が適しているが、他の酸洗
浄あるいはその他の用途の酸であつてもよい。上
記目的に使用する酸としては食品添加物グレード
のものが好ましい。
本発明の酸用腐食抑制剤が腐食抑制の対象とす
るのは、鉄（鋼材）、アルミニウム等の金属であ
つて、プラント、タンク、配管等の内部径路を有
するものに限らず、食器等の単一物品であつても
よい。
本発明の酸用腐食抑制剤は酸洗浄における洗浄
液としての酸液に添加して使用する場合が多い
が、このほかに一般の酸と接触する系の腐食抑制
のために使用することができる。この場合酸とし
ては液状に限らず、固体または気体状のものであ
つてもよい。
酸液に添加して使用する場合の腐食抑制剤の添
加量は、腐食抑制対象金属の材質、酸の種類、濃
度、温度等によつて異なるが、一般的には0.1
mg／以上、好ましくは10〜200000mg／程度で
ある。酸液の濃度は制限はないが、酸洗浄では一
般に１〜10重量％程度である。腐食抑制剤は常温
で使用してもよく、加熱または冷却下で使用して
もよい。
本発明の酸用腐食抑制剤の腐食抑制機構は明ら
かではないが、金属表面に不溶性の皮膜を形成す
ることにより、腐食を抑制するものと推測され
る。この場合、チアミン、システイン、シスチン
およびこれらの水溶性塩以外のアミノ酸、特に分
子構造中にイオウ原子を含まないアミノ酸を用い
ても、本発明のような腐食抑制効果は得られな
い。
〔発明の効果〕
本発明の酸用腐食抑制剤は食品添加物として認
められ、人体に摂取されても人体に害を与えるこ
とがないため、酸洗浄等の終了後、酸用腐食抑制
剤が残留しても人体に対する害はなく、安全性は
高い。また臭気、皮膚刺激等もないため、取扱が
容易で、作業中の安全性も高い。そして酸洗浄等
の酸の効力を失することなく、金属の腐食を有効
に抑制することができ、このため人体に摂取され
る物質と接触する系あるいは人体に接する物品を
処理する系などにおいて、安全かつ有効に金属の
腐食を抑制することができる。
〔実施例〕
以下、本発明の実施例について説明する。
実施例 １
表１に示す成分からなる腐食抑制剤を1000mg／
含む５重量％クエン酸に、予め重量を測定した
鋼材（S55C）を試料として室温で40時間浸漬し
た。浸漬後試料を水洗乾燥して後重量を測定し、
初期重量との差により腐食量Ｗを求めた。そして
薬剤無添加時の腐食量W0および薬剤添加時の腐
食量W1から下記式により腐食抑制率を求めた結
果を表１に示す。比較例として、食品添加物でな
い市販品のアミン系腐食抑制剤について同様の試
験を行つた結果を併記する。
腐食抑制率（％）＝W0−W1／W0×100
[Industrial Application Field] This invention relates to an acid corrosion inhibitor for preventing corrosion of metals that come into contact with acids. [Prior art] Conventionally, acids such as hydrochloric acid and citric acid are used as cleaning agents for acid cleaning of steel materials, boiler plants, etc., and thioureas, amines, etc. are used as corrosion inhibitors for these acids.
Alkaloids etc. are used. On the other hand, for cleaning systems that come into contact with substances ingested by the human body, such as food manufacturing processes, hot water piping, and water tanks, highly safe food additive-grade hydrochloric acid, (poly)phosphoric acid, and citric acid are used as cleaning agents. However, there are no known safe corrosion inhibitors that can prevent corrosion caused by these acids. [Problems to be solved by the invention] In the prior art as described above, acid corrosion inhibitors used in general acid cleaning are harmful (toxic) to the human body, so they cannot be ingested by the human body during food manufacturing processes. It cannot be used for acid cleaning of systems that come into contact with substances exposed to corrosion, and in such systems, acid cleaning must be carried out in the substantial absence of corrosion inhibitors, resulting in safety and corrosion inhibition effects. A corrosion inhibitor for acids with high corrosion resistance is desired. [Means for Solving the Problems] The present invention is intended to meet the above-mentioned needs, and aims to provide a food additive grade acid corrosion inhibitor that is safe for the human body and highly effective in inhibiting corrosion. The purpose is The present invention is an acid corrosion inhibitor characterized by containing as an active ingredient one or more amino acids selected from the group consisting of thiamine, cysteine, cystine, and water-soluble salts thereof. Thiamine, cysteine and cystine include derivatives and modified products. As these salts, substantially water-soluble salts such as hydrochloride, nitrate, phosphate, etc. can be used. These thiamin, cysteine, cystine, and their water-soluble salts may be used alone or in combination of two or more, and may also be used in combination with other corrosion inhibitors or auxiliaries. Good too. Examples of acids for which the acid corrosion inhibitor of the present invention is used include inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, and sulfamic acid, and organic acids such as citric acid and malic acid. The acids for which the acid corrosion inhibitor of the present invention is used include acid cleaning of systems that come into contact with substances ingested by the human body, such as food manufacturing processes, hot water supply equipment, water supply equipment, etc., or of articles that come into contact with the human body, such as food. An acid as a cleaning liquid for acid cleaning is suitable, but acids for other acid cleaning or other uses may also be used. The acid used for the above purpose is preferably one of food additive grade. The acid corrosion inhibitor of the present invention can inhibit corrosion of metals such as iron (steel) and aluminum, and is not limited to those with internal paths such as plants, tanks, and piping, as well as tableware and other metals. It may be a single item. The acid corrosion inhibitor of the present invention is often used by being added to an acid solution as a cleaning solution in acid cleaning, but it can also be used to inhibit corrosion of systems that come into contact with general acids. In this case, the acid is not limited to liquid, but may be solid or gaseous. The amount of corrosion inhibitor added when used in an acid solution varies depending on the material of the metal to be corrosion inhibited, the type of acid, concentration, temperature, etc., but generally it is 0.1
mg/or more, preferably about 10 to 200000 mg/. There is no limit to the concentration of the acid solution, but in acid cleaning it is generally about 1 to 10% by weight. The corrosion inhibitor may be used at room temperature, or may be used under heating or cooling. Although the corrosion inhibition mechanism of the acid corrosion inhibitor of the present invention is not clear, it is presumed that corrosion is inhibited by forming an insoluble film on the metal surface. In this case, even if amino acids other than thiamine, cysteine, cystine, and their water-soluble salts are used, especially amino acids that do not contain a sulfur atom in their molecular structure, the corrosion inhibiting effect of the present invention cannot be obtained. [Effects of the Invention] The acid corrosion inhibitor of the present invention is recognized as a food additive and will not cause any harm to the human body even if ingested. Even if it remains, there is no harm to the human body and it is highly safe. In addition, there is no odor or skin irritation, so it is easy to handle and has high safety during work. In addition, it is possible to effectively suppress corrosion of metals without losing the effectiveness of acids such as acid cleaning, and for this reason, in systems that come into contact with substances that are ingested by the human body or systems that treat items that come into contact with the human body, etc. Metal corrosion can be suppressed safely and effectively. [Examples] Examples of the present invention will be described below. Example 1 1000mg/1000mg of a corrosion inhibitor consisting of the ingredients shown in Table 1
A steel material (S55C), whose weight had been measured in advance, was immersed as a sample in 5% by weight citric acid at room temperature for 40 hours. After immersion, the sample was washed with water and dried, and its weight was measured.
The amount of corrosion W was determined from the difference from the initial weight. Table 1 shows the results of calculating the corrosion inhibition rate using the following formula from the amount of corrosion W 0 when no chemical was added and the amount W 1 of corrosion when the chemical was added. As a comparative example, the results of a similar test conducted on a commercially available amine-based corrosion inhibitor that is not a food additive are also listed. Corrosion inhibition rate (%) = W 0 −W 1 /W 0 ×100
【表】
実施例 ２
表２に示す成分からなる腐食抑制剤を0.5重量
％含む５重量％塩酸を使用して実施例１と同条件
で試験した結果を表２に示す。[Table] Example 2 Table 2 shows the results of a test conducted under the same conditions as in Example 1 using 5% by weight hydrochloric acid containing 0.5% by weight of a corrosion inhibitor consisting of the components shown in Table 2.
【表】
以上の結果より、本発明の酸用腐食抑制剤は、
市販品とほぼ同等の高い腐食抑制効果を示すこと
がわかる。
比較例
実施例１において、腐食抑制剤としてＬ−バリ
ン、Ｌ−イソロイシン、Ｌ−リジン塩酸塩、Ｌ−
フエニルアラニンをそれぞれ用いた他は、実施例
１と同じ方法により腐食試験を行つた。結果を表
３に示す。[Table] From the above results, the acid corrosion inhibitor of the present invention is
It can be seen that it exhibits a high corrosion inhibition effect almost equivalent to that of commercially available products. Comparative Example In Example 1, L-valine, L-isoleucine, L-lysine hydrochloride, L-
A corrosion test was conducted in the same manner as in Example 1, except that phenylalanine was used in each case. The results are shown in Table 3.
【表】
以上の結果より、分子構造中にイオウ原子を含
まないアミノ酸は腐食抑制効果が小さいことがわ
かる。[Table] From the above results, it can be seen that amino acids that do not contain sulfur atoms in their molecular structure have a small corrosion inhibiting effect.
Claims (1)
らの水溶性塩から成る群から選ばれる１種以上の
アミノ酸を有効成分として含有することを特徴と
する酸用腐食抑制剤。 ２ 水溶性塩が塩酸塩、硝酸塩またはリン酸塩で
ある特許請求の範囲第１項記載の酸用腐食抑制
剤。 ３ 酸が酸洗浄の洗浄液である特許請求の範囲第
１項または第２項記載の酸用腐食抑制剤。[Scope of Claims] 1. An acid corrosion inhibitor characterized by containing as an active ingredient one or more amino acids selected from the group consisting of thiamine, cysteine, cystine, and water-soluble salts thereof. 2. The acid corrosion inhibitor according to claim 1, wherein the water-soluble salt is a hydrochloride, a nitrate, or a phosphate. 3. The acid corrosion inhibitor according to claim 1 or 2, wherein the acid is a cleaning solution for acid cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24549085A JPS62107092A (en) | 1985-11-01 | 1985-11-01 | Corrosion inhibitor for acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24549085A JPS62107092A (en) | 1985-11-01 | 1985-11-01 | Corrosion inhibitor for acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62107092A JPS62107092A (en) | 1987-05-18 |
| JPS6345472B2 true JPS6345472B2 (en) | 1988-09-09 |
Family
ID=17134433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24549085A Granted JPS62107092A (en) | 1985-11-01 | 1985-11-01 | Corrosion inhibitor for acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62107092A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19518693A1 (en) * | 1995-05-22 | 1996-11-28 | Henkel Kgaa | Automatic dishwashing detergent with silver corrosion inhibitor |
| US6447717B1 (en) * | 1999-06-04 | 2002-09-10 | Donlar Corporation | Composition and method for inhibition of metal corrosion |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113185A (en) * | 1982-12-17 | 1984-06-29 | Tomoji Tanaka | Surface treatment of metal without causing environmental pollution |
-
1985
- 1985-11-01 JP JP24549085A patent/JPS62107092A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113185A (en) * | 1982-12-17 | 1984-06-29 | Tomoji Tanaka | Surface treatment of metal without causing environmental pollution |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62107092A (en) | 1987-05-18 |
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