BE450004A - - Google Patents
Info
- Publication number
- BE450004A BE450004A BE450004DA BE450004A BE 450004 A BE450004 A BE 450004A BE 450004D A BE450004D A BE 450004DA BE 450004 A BE450004 A BE 450004A
- Authority
- BE
- Belgium
- Prior art keywords
- emi
- alcohols
- acetylenic
- metals
- acids
- Prior art date
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
- 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
- C23G1/068—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors compounds containing a C=C bond
-
- 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
- C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
Procédé pour empêcher la corrosion des métaux par des acides.
<EMI ID=1.1>
aux bains acides, servant au mordançage des métaux, des substances organiques qui empêchent l'attaque des métaux par l'acide, sans toutefois compromettre la tâche ou la destination proprement dite
<EMI ID=2.1>
talli ques adhérant à la surface du métal. Par exemple, onautilisé comme mordants économiques des résidus de la distillation du gou-
<EMI ID=3.1>
produits de condensation des thiourées avec d.es aldéhydes, ou des composés hétérocycliques renfermant de l'azote et de l'oxygène.
Or, on a trouvé, suivant la présente invention, que des alcools de la série acétylénique, par exemple l'alcool propargylique
<EMI ID=4.1>
empêcher ou. diminuer la corrosion des métaux par des acides. L'action inhibitrice des alcools de ce genre n'est pas plus grande que
<EMI ID=5.1>
<EMI ID=6.1>
lubilité dans l'eau des alcools de la série acétylénique apporte des avantages précieux pour l'usage envisagé ici. En effet, on peut économiser-les agents de mouillage, considerés souvent comme nécessaires pour la meilleure répartition des composés insolubles, auxquels appartiennent les sulfures et les sulfoxydes connus. Les mordants insolubles dans l'eau adhérent de manière tenace, après le traitement, à la surface métallique, alors que, par contre, les alcools acétyléniques, restent pratiquaient entièrement dissous dans la lessive de mordançage, de sorte qu'on peut utiliser cette der- <EMI ID=7.1>
tallique traitée à un état entièrement propre par simple rinçage.-
<EMI ID=8.1>
alliages contre l'attaque des acides les plus divers. L'action protectrice dépend de la force de l'acide, de la température et de la quantité d'alcool acétylénique ajoutée.
L'action avantageuse des alcools acétyléniques peut être illustrée par l'exemple suivant.
Des languettes de tôle de fer furent exposées, pendant
<EMI ID=9.1>
<EMI ID=10.1>
tions suivantes:
<EMI ID=11.1>
<EMI ID=12.1>
<EMI ID=13.1>
Process for preventing corrosion of metals by acids.
<EMI ID = 1.1>
acid baths, used for etching metals, organic substances that prevent the attack of metals by acid, without compromising the task or the destination itself
<EMI ID = 2.1>
talli c adhering to the metal surface. For example, residues from the distillation of gou-
<EMI ID = 3.1>
condensation products of thioureas with aldehydes, or heterocyclic compounds containing nitrogen and oxygen.
However, it has been found, according to the present invention, that alcohols of the acetylenic series, for example propargyl alcohol
<EMI ID = 4.1>
prevent or. reduce corrosion of metals by acids. The inhibiting action of alcohols of this kind is not greater than
<EMI ID = 5.1>
<EMI ID = 6.1>
Water lubricity of acetylenic series alcohols provides valuable advantages for the use contemplated herein. In fact, it is possible to save the wetting agents, often considered as necessary for the better distribution of the insoluble compounds, to which the known sulfides and sulfoxides belong. Mordants insoluble in water adhere tenaciously, after treatment, to the metal surface, while, on the other hand, acetylenic alcohols, remain practically completely dissolved in the mordanting lye, so that this der can be used. - <EMI ID = 7.1>
metal treated to a completely clean state by simple rinsing.
<EMI ID = 8.1>
alloys against the attack of the most diverse acids. The protective action depends on the strength of the acid, the temperature and the amount of acetylenic alcohol added.
The advantageous action of acetylenic alcohols can be illustrated by the following example.
Sheet iron tabs were exposed, during
<EMI ID = 9.1>
<EMI ID = 10.1>
following tions:
<EMI ID = 11.1>
<EMI ID = 12.1>
<EMI ID = 13.1>
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI69861D DE744789C (en) | 1941-06-19 | 1941-06-19 | Process for preventing the corrosion of metals by acids |
Publications (1)
Publication Number | Publication Date |
---|---|
BE450004A true BE450004A (en) | 1943-05-31 |
Family
ID=7197056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE450004D BE450004A (en) | 1941-06-19 | 1943-04-02 |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE450004A (en) |
DE (1) | DE744789C (en) |
FR (1) | FR893407A (en) |
NL (1) | NL63418C (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1172925B (en) * | 1957-02-16 | 1964-06-25 | Basf Ag | Anti-corrosive agents |
DE1130666B (en) * | 1958-03-13 | 1962-05-30 | Siemens Ag | Process for removing rust from objects and systems made of iron and / or steel, in particular pipe systems and boiler systems |
DE1265533B (en) * | 1958-11-26 | 1968-04-04 | Amchem Prod | Inhibitors |
FR2592397A1 (en) * | 1985-12-26 | 1987-07-03 | Maron Hugues | Corrosion inhibitor for pickling baths for metal surfaces |
EP1670972A1 (en) * | 2003-09-30 | 2006-06-21 | BASF Aktiengesellschaft | Method for pickling metallic surfaces by using alkoxylated alkynols |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE579955C (en) * | 1931-03-06 | 1933-07-03 | I G Farbenindustrie Akt Ges | Preparations for protecting metals against attack by non-oxidizing acids |
DE579864C (en) * | 1931-08-14 | 1933-07-01 | I G Farbenindustrie Akt Ges | Metal saving stain |
-
1941
- 1941-06-19 DE DEI69861D patent/DE744789C/en not_active Expired
-
1943
- 1943-03-20 NL NL110582A patent/NL63418C/xx active
- 1943-04-02 BE BE450004D patent/BE450004A/fr unknown
- 1943-04-09 FR FR893407D patent/FR893407A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL63418C (en) | 1949-06-15 |
FR893407A (en) | 1944-06-08 |
DE744789C (en) | 1944-01-25 |
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