CH689307A5 - Process for both corrosion inhibition and strengthening the bonding properties of reinforcing metals. - Google Patents
Process for both corrosion inhibition and strengthening the bonding properties of reinforcing metals. Download PDFInfo
- Publication number
- CH689307A5 CH689307A5 CH01080/95A CH108095A CH689307A5 CH 689307 A5 CH689307 A5 CH 689307A5 CH 01080/95 A CH01080/95 A CH 01080/95A CH 108095 A CH108095 A CH 108095A CH 689307 A5 CH689307 A5 CH 689307A5
- Authority
- CH
- Switzerland
- Prior art keywords
- metal
- hydrazine
- metals
- surface treatment
- hydroxylamine
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/015—Anti-corrosion coatings or treating compositions, e.g. containing waterglass or based on another metal
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Metallurgy (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Treatment Of Metals (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
Abstract
The novel process serves simultaneously to inhibit corrosion and to improve adhesion characteristics of reinforcing metals for and in cement systems. It involves surface treatment of the metal parts by Fe-, Ca/Zn, Zn or Mn-phosphatisation and subsequent surface treatment using an aqueous solution or slurry of reducing and/or passivating compounds (such as nitrites, chromates, hydrazine or hydrazine derivatives, hydroxylamine or hydroxylamine derivatives), and/or organic corrosion inhibitors. If necessary, the phosphate layers can undergo subsequent impregnation with non-aqueous or aqueous solutions of other corrosion inhibitors, e.g. vapour phase inhibitor, adhesive promotors, metal-non-metal sols and/or concrete/cement additives.
Description
Die hier befasste Erfindung betrifft ein Verfahren sowohl zur Korrosionsinhibierung wie auch zur Verstärkung der Verbundeigenschaften von Armierungsmetallen sowie die Verwendung von derart behandelten Armierungsmetallen in armierten Betonteilen.
Die allgemeine Problematik der Korrosion von Armierungsmetallen ist u.a. in der Einleitung zur EP-A 0 285 593 dargestellt. Gemäss der Lehre in dieser Schrift werden Armierungsstangen während bzw. gleich nach der thermischen Nachbehandlung des Stahls oberflächlich in Schmelzbädern phosphatiert oder oxidiert.
Das in der DE-A 3 708 983 gelehrte gattungsanaloge Verfahren schlägt eine Oberflächenbeschichtung von Armierungsstahl mit Fluor-KW-Copolymeren vor.
Demgegenüber ist das erfindungsgemässe Verfahren sowohl zur Korrosionsinhibierung wie auch zur Verstärkung der Verbundeigenschaften von Armierungsmetallen sowie die Verwendung der erfindungsgemäss behandelten Armierungsmetalle in den weiter hinten folgenden Patentansprüchen charakterisiert.
Das erfindungsgemässe Verfahren wird nun anhand von beispielhaften Ausführungen näher erläutert:
Der Phosphatierungs-Schritt wird in Metallphosphatbädern, v.a. in Fe-, Zn-, Zn/Ca- oder Mn-Phosphatbädern ausgeführt. Hierzu eingesetzte chemische Beschleuniger umfassen wasserlösliche Oxydationsmittel wie Nitrate, Chlorate oder Chromate bzw. organische Beschleuniger wie N-haltige Verbindungen, speziell Anilin oder Pyridin oder aromatische Carbonsäuren.
Die genannte Phosphatierung geschieht batchweise oder kontinuierlich, in Bädern oder Spritzanlagen bei Raumtemperaturen oder darüber.
Nach der Austrocknung der Phosphatierungsschicht (die einige 10 mu m betragen kann), welche üblicherweise mittels Heissluft ausgeführt wird, wird die genannte Schicht einer anschliessenden Oberflächenbehandlung unterworfen; diese zweite Behandlung geschieht normalerweise bei Raumtemperatur.
Verwendet werden hierzu wässerige Lösungen bzw. Aufschlämmungen von reduzierenden und/oder passivierenden Verbindungen, v.a. von Nitriten oder Hydrazin bzw. Hydrazinsalzen oder Hydroxylamin bzw. Hydroxylaminsalzen, von Chromaten und von natürlichen und/oder synthetischen \len, gegebenenfalls versetzt mit Paraffin, Stearaten oder Lanolin.
Vorzugsweise wird anschliessend die so nachbehandelte Phosphatschicht mittels Metall-/Nichtmetall-Solen, insbesondere Selen-, Arsen und/oder Siliziumdioxid-Solen - letztere auch Kiesel-Sole genannte - oder auf Acrylsäure beruhende Polymer- und/oder Copolymer-Solen imprägniert.
Als Beton-Zusatzmittel kann dabei ein Wasser-Reduzierungsmittel verwendet werden.
The invention concerned here relates to a method both for corrosion inhibition and for strengthening the composite properties of reinforcing metals and the use of reinforcing metals treated in this way in reinforced concrete parts.
The general problem of corrosion of reinforcing metals includes presented in the introduction to EP-A 0 285 593. According to the teaching in this document, reinforcement rods are phosphated or oxidized on the surface during or immediately after the thermal post-treatment of the steel in melt baths.
The generic analog method taught in DE-A 3 708 983 proposes a surface coating of reinforcing steel with fluorine-KW copolymers.
In contrast, the method according to the invention both for inhibiting corrosion and for strengthening the composite properties of reinforcing metals and the use of the reinforcing metals treated according to the invention are characterized in the patent claims which follow below.
The method according to the invention will now be explained in more detail using exemplary embodiments:
The phosphating step is carried out in metal phosphate baths, especially executed in Fe, Zn, Zn / Ca or Mn phosphate baths. Chemical accelerators used for this purpose include water-soluble oxidizing agents such as nitrates, chlorates or chromates or organic accelerators such as N-containing compounds, especially aniline or pyridine or aromatic carboxylic acids.
The phosphating mentioned takes place batchwise or continuously, in baths or spraying systems at room temperatures or above.
After the phosphating layer (which can be a few 10 μm) has dried out, which is usually carried out by means of hot air, the said layer is subjected to a subsequent surface treatment; this second treatment is usually done at room temperature.
For this purpose, aqueous solutions or slurries of reducing and / or passivating compounds are used, especially of nitrites or hydrazine or hydrazine salts or hydroxylamine or hydroxylamine salts, of chromates and of natural and / or synthetic oils, optionally mixed with paraffin, stearates or lanolin.
The phosphate layer which has been post-treated in this way is then preferably impregnated by means of metal / non-metal sols, in particular selenium, arsenic and / or silicon dioxide sols - the latter also called silica sols - or polymer and / or copolymer sols based on acrylic acid.
A water reducing agent can be used as a concrete additive.
Claims (6)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01080/95A CH689307A5 (en) | 1995-04-13 | 1995-04-13 | Process for both corrosion inhibition and strengthening the bonding properties of reinforcing metals. |
AT96904249T ATE183553T1 (en) | 1995-04-13 | 1996-03-19 | CORROSION INHIBITION AND IMPROVEMENT OF THE BOND PROPERTIES OF REINFORCING METALS |
EP96904249A EP0755462B1 (en) | 1995-04-13 | 1996-03-19 | Corrosion inhibition and improvement of adhesion characteristics of reinforcing metals |
PCT/IB1996/000244 WO1996032522A1 (en) | 1995-04-13 | 1996-03-19 | Corrosion inhibition and improvement of adhesion characteristics of reinforcing metals |
DE59602778T DE59602778D1 (en) | 1995-04-13 | 1996-03-19 | CORROSION INHIBITATION AND IMPROVEMENT OF THE ASSEMBLY PROPERTIES OF ARMORING METALS |
JP8530838A JPH10501849A (en) | 1995-04-13 | 1996-03-19 | Corrosion prevention of reinforcement metal and improvement of bonding characteristics |
DK96904249T DK0755462T3 (en) | 1995-04-13 | 1996-03-19 | Corrosion inhibition and enhancement of the adhesive properties of reinforcing metals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01080/95A CH689307A5 (en) | 1995-04-13 | 1995-04-13 | Process for both corrosion inhibition and strengthening the bonding properties of reinforcing metals. |
Publications (1)
Publication Number | Publication Date |
---|---|
CH689307A5 true CH689307A5 (en) | 1999-02-15 |
Family
ID=4201995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH01080/95A CH689307A5 (en) | 1995-04-13 | 1995-04-13 | Process for both corrosion inhibition and strengthening the bonding properties of reinforcing metals. |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0755462B1 (en) |
JP (1) | JPH10501849A (en) |
AT (1) | ATE183553T1 (en) |
CH (1) | CH689307A5 (en) |
DE (1) | DE59602778D1 (en) |
DK (1) | DK0755462T3 (en) |
WO (1) | WO1996032522A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100245851B1 (en) * | 1997-01-16 | 2000-03-02 | 한규택 | Gluing method of gluing, anti-rust paints for steel pipe and steel bar |
JP2001271184A (en) * | 2000-03-24 | 2001-10-02 | Nisshin Kako Kk | Corrosion protection treating agent and method for stainless steel |
WO2011076273A1 (en) * | 2009-12-23 | 2011-06-30 | Vsl International Ag | Improved strand and method of producing the same |
JP5312526B2 (en) * | 2011-06-13 | 2013-10-09 | 株式会社ピーエス三菱 | Method for inhibiting corrosion of PC tendons |
CN103161182A (en) * | 2011-12-09 | 2013-06-19 | 彭道儒 | Novel anticorrosion process of concrete reinforcing steel bar phosphorization mitigation method |
CN104962935A (en) * | 2015-06-13 | 2015-10-07 | 周彩球 | Copper alloy acid pickling passivant |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2992131A (en) * | 1957-03-21 | 1961-07-11 | Jenolite Ltd | Treatment of metal surfaces |
FR2527246A1 (en) * | 1982-05-21 | 1983-11-25 | Freyssinet Int Stup | IMPROVEMENTS IN PRE-STRESS CONDUITS AND THEIR MANUFACTURING METHODS |
BE1000432A6 (en) * | 1987-04-03 | 1988-12-06 | Centre Rech Metallurgique | Method for improving the corrosion resistance of steel rebar and self-quenching income. |
-
1995
- 1995-04-13 CH CH01080/95A patent/CH689307A5/en not_active IP Right Cessation
-
1996
- 1996-03-19 EP EP96904249A patent/EP0755462B1/en not_active Expired - Lifetime
- 1996-03-19 DK DK96904249T patent/DK0755462T3/en active
- 1996-03-19 JP JP8530838A patent/JPH10501849A/en active Pending
- 1996-03-19 AT AT96904249T patent/ATE183553T1/en not_active IP Right Cessation
- 1996-03-19 DE DE59602778T patent/DE59602778D1/en not_active Expired - Fee Related
- 1996-03-19 WO PCT/IB1996/000244 patent/WO1996032522A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
WO1996032522A1 (en) | 1996-10-17 |
ATE183553T1 (en) | 1999-09-15 |
JPH10501849A (en) | 1998-02-17 |
EP0755462B1 (en) | 1999-08-18 |
DE59602778D1 (en) | 1999-09-23 |
EP0755462A1 (en) | 1997-01-29 |
DK0755462T3 (en) | 2000-03-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUE | Assignment |
Owner name: HOLDERCHEM HOLDING AG TRANSFER- CEMENT INTELLECTUA |
|
PL | Patent ceased |