EP0240982A2 - Procédé de traitement de surfaces en fer ou en acier - Google Patents

Procédé de traitement de surfaces en fer ou en acier Download PDF

Info

Publication number: EP0240982A2
Authority: EP; European Patent Office
Prior art keywords: guanidine; mixed; treatment; solution; imine
Prior art date: 1986-04-11
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP87105110A

Other languages

German (de)

English (en)

Other versions

EP0240982A3 (fr

Inventor

George Higgins

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

GEA Group AG

Original Assignee

Metallgesellschaft AG

Priority date (The priority date 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 date listed.)

1986-04-11

Filing date

1987-04-07

Publication date

1987-10-14

1987-04-07 Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG

1987-10-14 Publication of EP0240982A2 publication Critical patent/EP0240982A2/fr

1989-03-22 Publication of EP0240982A3 publication Critical patent/EP0240982A3/fr

Status Withdrawn legal-status Critical Current

Links

XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 18
238000000034 method Methods 0.000 title claims abstract description 14
229910000831 Steel Inorganic materials 0.000 title claims abstract description 10
239000010959 steel Substances 0.000 title claims abstract description 10
229910052742 iron Inorganic materials 0.000 title claims abstract description 9
ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims abstract description 18
NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 18
238000005422 blasting Methods 0.000 claims abstract description 18
-1 imide compound Chemical class 0.000 claims abstract description 11
150000002466 imines Chemical class 0.000 claims abstract description 11
CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims abstract description 9
RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 claims abstract description 9
229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 9
SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims abstract description 9
NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 9
STIAPHVBRDNOAJ-UHFFFAOYSA-N carbamimidoylazanium;carbonate Chemical compound NC(N)=N.NC(N)=N.OC(O)=O STIAPHVBRDNOAJ-UHFFFAOYSA-N 0.000 claims abstract description 7
KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims abstract description 6
CVSVTCORWBXHQV-UHFFFAOYSA-N creatine Chemical compound NC(=[NH2+])N(C)CC([O-])=O CVSVTCORWBXHQV-UHFFFAOYSA-N 0.000 claims abstract description 6
239000007787 solid Substances 0.000 claims abstract description 5
FUPAJKKAHDLPAZ-UHFFFAOYSA-N 1,2,3-triphenylguanidine Chemical compound C=1C=CC=CC=1NC(=NC=1C=CC=CC=1)NC1=CC=CC=C1 FUPAJKKAHDLPAZ-UHFFFAOYSA-N 0.000 claims abstract description 3
RSEBUVRVKCANEP-UHFFFAOYSA-N 2-pyrroline Chemical compound C1CC=CN1 RSEBUVRVKCANEP-UHFFFAOYSA-N 0.000 claims abstract description 3
HAMNKKUPIHEESI-UHFFFAOYSA-N aminoguanidine Chemical compound NNC(N)=N HAMNKKUPIHEESI-UHFFFAOYSA-N 0.000 claims abstract description 3
JPIYZTWMUGTEHX-UHFFFAOYSA-N auramine O free base Chemical compound C1=CC(N(C)C)=CC=C1C(=N)C1=CC=C(N(C)C)C=C1 JPIYZTWMUGTEHX-UHFFFAOYSA-N 0.000 claims abstract description 3
229960003624 creatine Drugs 0.000 claims abstract description 3
239000006046 creatine Substances 0.000 claims abstract description 3
QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims abstract description 3
XKJCHHZQLQNZHY-UHFFFAOYSA-N phthalimide Chemical compound C1=CC=C2C(=O)NC(=O)C2=C1 XKJCHHZQLQNZHY-UHFFFAOYSA-N 0.000 claims abstract description 3
ZVJHJDDKYZXRJI-UHFFFAOYSA-N pyrroline Natural products C1CC=NC1 ZVJHJDDKYZXRJI-UHFFFAOYSA-N 0.000 claims abstract description 3
239000003082 abrasive agent Substances 0.000 claims description 7
239000003795 chemical substances by application Substances 0.000 claims description 6
239000003112 inhibitor Substances 0.000 claims description 6
229940085991 phosphate ion Drugs 0.000 claims 1
239000000243 solution Substances 0.000 abstract description 14
238000005260 corrosion Methods 0.000 abstract description 7
230000007797 corrosion Effects 0.000 abstract description 7
239000007864 aqueous solution Substances 0.000 abstract description 3
239000004922 lacquer Substances 0.000 abstract description 3
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
230000015572 biosynthetic process Effects 0.000 description 4
JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
239000002184 metal Substances 0.000 description 4
229910052751 metal Inorganic materials 0.000 description 4
LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
229910052799 carbon Inorganic materials 0.000 description 3
238000010422 painting Methods 0.000 description 3
229910019142 PO4 Inorganic materials 0.000 description 2
229920000388 Polyphosphate Polymers 0.000 description 2
239000000654 additive Substances 0.000 description 2
150000001721 carbon Chemical group 0.000 description 2
230000002349 favourable effect Effects 0.000 description 2
229910052500 inorganic mineral Inorganic materials 0.000 description 2
239000011707 mineral Substances 0.000 description 2
229910052757 nitrogen Inorganic materials 0.000 description 2
239000003973 paint Substances 0.000 description 2
239000012071 phase Substances 0.000 description 2
239000010452 phosphate Substances 0.000 description 2
239000001205 polyphosphate Substances 0.000 description 2
239000002893 slag Substances 0.000 description 2
235000010288 sodium nitrite Nutrition 0.000 description 2
QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
235000019778 Stone Grit Nutrition 0.000 description 1
239000002253 acid Substances 0.000 description 1
239000004480 active ingredient Substances 0.000 description 1
230000000996 additive effect Effects 0.000 description 1
150000004649 carbonic acid derivatives Chemical class 0.000 description 1
238000000576 coating method Methods 0.000 description 1
150000001875 compounds Chemical class 0.000 description 1
239000000428 dust Substances 0.000 description 1
230000007613 environmental effect Effects 0.000 description 1
125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
150000003949 imides Chemical class 0.000 description 1
230000001771 impaired effect Effects 0.000 description 1
230000002401 inhibitory effect Effects 0.000 description 1
239000007791 liquid phase Substances 0.000 description 1
235000011176 polyphosphates Nutrition 0.000 description 1
230000005855 radiation Effects 0.000 description 1
150000003839 salts Chemical class 0.000 description 1
235000019830 sodium polyphosphate Nutrition 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
- 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
- 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
- C23C22/73—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 characterised by the process
- C23C22/76—Applying the liquid by spraying

Definitions

the invention relates to a method for the treatment of iron or steel surfaces with the aid of solid blasting media which are mixed with an aqueous inhibitor-containing solution.
wet blasting water-soluble corrosive salts that remain on the surface during dry blasting can also be removed.
a disadvantage of wet blasting is that the freshly blasted surface is very clean and extremely reactive when wet. This promotes rust formation that is harmful for subsequent painting.
a corrosion inhibitor such as sodium nitrite and polyphosphate
sodium nitrite can very well reduce corrosion if the concentration is set correctly. But when used in too low Concentration will accelerate rust formation. If the concentration is too low, polyphosphate also allows rust formation. If the concentrations are too high or if they accumulate in the liquid phase and partially dry on the metal surface, the adhesion of the lacquer applied subsequently is unsatisfactory.
the films produced on the metal surface with these corrosion inhibitors are water-soluble. If a water rinse is provided, they are therefore removed again from the iron or steel surface, with the result that the surface is again exposed to the corrosion attack.
the object of the invention is to provide a method for the treatment of iron or steel surfaces with the aid of solid blasting media, which prevents rusting during blasting and after blasting, increases the adhesion of a subsequently applied lacquer and in particular results that are satisfactory over a wide concentration range of the inhibitor, regardless of whether the blasted surfaces are rinsed with water or not.
the object is achieved by designing the method of the type mentioned at the outset in accordance with the invention in such a way that at least in the final phase of the treatment, abrasives are used which are mixed with a solution containing phosphate ions and imine or imide compound.
the solution should be substantially free of metal, ammonium or amine cations that could be incorporated into the corrosion inhibiting layer formed.
the solution is therefore most conveniently prepared by dissolving imine or imide phosphate, if appropriate with additional free phosphoric acid, or by dissolving phosphoric acid and water-soluble imine or imide compound, generally the carbonate compounds, in water.
a nitrogen / carbon grouping is characteristic of imine or imide compounds, in which the NH group is bonded to one carbon atom by means of a double bond or to one carbon atom by means of two single bonds.
the H atom on the nitrogen can optionally be substituted.
Any compound that is soluble in phosphoric acid solution can be used.
abrasives are used which are mixed with a solution containing phosphate ions and aminoguanidine, auramine, creatine, dicyandiamide, guanidine, phthalimide, pyrrole, pyrroline, pyrrolidine, rosindulin and / or triphenylguanidine.
blasting media which are mixed with a solution containing phosphate ions and guanidine.
blasting agents are used which are mixed with an additive of phosphoric acid and guanidine carbonate in a weight ratio (0.3 to 3): 1, preferably (0.5 to 0.75): l, solution obtained are added. Equivalent amounts are recommended when using other imine or imide compounds.
the absolute amounts of active ingredients are not particularly critical. If the phosphoric acid concentration is above the optimal value, the major part of the excess phosphoric acid reacts with the iron or steel surface. Any residue that does not react is rinsed off, in particular if rinsing is provided. If the addition of guanidine or another imine or imide compound is more than the optimum, no real solution may be created, i.e. part of the addition remains unsolved. If the addition is not excessively high, there is no disadvantage from a technical point of view, only the process becomes uneconomical.
a further advantageous embodiment of the invention consists in using blasting media which are mixed with a solution obtained by adding 0.2 to 4.5 g / l guanidine (calculated as guanidine carbonate). Particularly favorable concentrations are in the range from 1.5 to 2.5 g / l. If the solutions are too dilute, satisfactory corrosion protection will no longer be achieved. At excessively high concentrations, paint adhesion can be impaired.
the duration of application of the method according to the invention depends on the condition of the metal surface to be treated. It can be used during the entire blast treatment, if necessary only in the final phase. This means that initially the wet radiation can only be carried out with the addition of water, and if necessary, it can also be blasted dry.
the treatment time with the blasting agent mixed with a solution of phosphate ions and imine or imide compound should expediently be in the range from 6 seconds to 2 minutes.
the treatment temperature is usually set to a value below 50 ° C, most advantageously to a value in the range from 10 to 25 ° C.
Suitable abrasives are e.g. Steel shot or grit, stone grit or granular mineral slag.
the pressure of the air / blasting agent jet should advantageously be 3.5 to 10 kg / cm2.
the amount of aqueous solution is usually in the range of 0.5 to 5 l / min.
Hot rolled steel was blasted with an air / mineral slag jet of 7 kg / cm2.
An aqueous solution of 2 g / l was applied to this jet Guanidine carbonate and 1.32 g / l phosphoric acid (calculated as 100% acid) were added.

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
General Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Chemical Treatment Of Metals (AREA)
Application Of Or Painting With Fluid Materials (AREA)
Preventing Corrosion Or Incrustation Of Metals (AREA)

EP87105110A 1986-04-11 1987-04-07 Procédé de traitement de surfaces en fer ou en acier Withdrawn EP0240982A3 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB8608797		1986-04-11
GB868608797A GB8608797D0 (en)	1986-04-11	1986-04-11	Compositions for abrasive blast cleaning

Publications (2)

Publication Number	Publication Date
EP0240982A2 true EP0240982A2 (fr)	1987-10-14
EP0240982A3 EP0240982A3 (fr)	1989-03-22

Family

ID=10596016

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP87105110A Withdrawn EP0240982A3 (fr)	1986-04-11	1987-04-07	Procédé de traitement de surfaces en fer ou en acier

Country Status (6)

Country	Link
US (1)	US4729770A (fr)
EP (1)	EP0240982A3 (fr)
JP (1)	JPS62243787A (fr)
DE (1)	DE3711636C2 (fr)
GB (2)	GB8608797D0 (fr)
PT (1)	PT84664B (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2250608B (en) *	1990-10-26	1994-11-30	Ricoh Kk	Surface machining method for electrophotographic photoconductor
US5266122A (en) *	1991-08-28	1993-11-30	The Tdj Group, Inc.	Method for fixing blast/cleaning waste
US5439527A (en) *	1991-08-28	1995-08-08	The Tdj Group, Inc.	Method for fixing blast/cleaning waste
US5344472A (en) *	1991-09-12	1994-09-06	Lynn William R	Method of recycling media for use in pressurized device
AU5093093A (en) *	1992-08-28	1994-03-29	Whitemetal, Inc.	Method for removal of surface contaminants from substrates
US5317841A (en) *	1992-08-28	1994-06-07	Whitemetal, Inc.	Method for removal of surface contaminants from metal substrates
US5527203A (en) *	1992-08-28	1996-06-18	Cook; Jack R.	Method for removal of surface contaminants from metal substrates
US5441441A (en) *	1992-08-28	1995-08-15	Cook; Jack R.	Method for removal of surface contaminants from concrete substrates
JP2599240B2 (ja) *	1992-10-21	1997-04-09	新日本製鐵株式会社	高速研磨流体ジェットにおける研磨材の防錆方法
US5681205A (en) *	1993-08-12	1997-10-28	Church & Dwight Co., Inc.	Method of using abrasive blast media containing corrosion inhibitor
US5575705A (en) *	1993-08-12	1996-11-19	Church & Dwight Co., Inc.	Slurry blasting process
US5529589A (en) *	1994-09-02	1996-06-25	Technology Trust Inc.	Fiber media blasting material, method of recycling same, and equipment for discharging same
WO1997014760A1 (fr) *	1995-10-17	1997-04-24	Chesapeake Specialty Products	Procede de traitement de materiaux contenant du fer et produits ainsi obtenus
US5827114A (en) *	1996-09-25	1998-10-27	Church & Dwight Co., Inc.	Slurry blasting process
US6117249A (en) *	1998-02-13	2000-09-12	Kerk Motion Products, Inc.	Treating metallic machine parts
DE10255213B4 (de) *	2002-11-27	2006-01-26	Daimlerchrysler Ag	Verfahren zur Vorbehandlung von Oberflächen für thermisch gespritzte Schichten
JP6249929B2 (ja) *	2014-03-27	2017-12-20	株式会社神戸製鋼所	鋼線材の連続表面処理方法
JP2020186556A (ja) *	2019-05-13	2020-11-19	ヤマダインフラテクノス株式会社	鋼橋の予防保全工法、及びこれに用いられる循環式ブラスト装置

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US1549409A (en) *	1921-06-22	1925-08-11	James H Gravell	Sand blasting
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GB712271A (en) *	1950-04-29	1954-07-21	Air Reduction	Improvements in the preparation of aluminium wire for use in the gas-shielded arc welding method
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US4125969A (en) *	1977-01-25	1978-11-21	A. Long & Company Limited	Wet abrasion blasting
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US4479917A (en) *	1983-11-14	1984-10-30	Olin Corporation	Use of aminoguanidine compounds as oxygen-scavenging and corrosion-inhibiting agents
US4519811A (en) *	1984-05-24	1985-05-28	Societe Nationale De L'amiante	Calcined serpentine useful as sandblasting agent

1986
- 1986-04-11 GB GB868608797A patent/GB8608797D0/en active Pending
- 1986-12-17 JP JP61299020A patent/JPS62243787A/ja active Pending
1987
- 1987-04-06 GB GB8708190A patent/GB2189261B/en not_active Expired - Fee Related
- 1987-04-06 US US07/034,830 patent/US4729770A/en not_active Expired - Fee Related
- 1987-04-07 EP EP87105110A patent/EP0240982A3/fr not_active Withdrawn
- 1987-04-07 DE DE3711636A patent/DE3711636C2/de not_active Expired - Lifetime
- 1987-04-10 PT PT84664A patent/PT84664B/pt not_active IP Right Cessation

Also Published As

Publication number	Publication date
DE3711636A1 (de)	1987-10-22
GB2189261A (en)	1987-10-21
JPS62243787A (ja)	1987-10-24
DE3711636C2 (de)	1995-03-16
GB8708190D0 (en)	1987-05-13
US4729770A (en)	1988-03-08
PT84664A (de)	1987-05-01
PT84664B (pt)	1989-11-30
EP0240982A3 (fr)	1989-03-22
GB8608797D0 (en)	1986-05-14
GB2189261B (en)	1990-08-01

Legal Events

Date	Code	Title	Description
1987-08-31	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1987-10-14	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): AT BE DE ES FR IT NL SE
1989-01-30	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1989-03-22	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): AT BE DE ES FR IT NL SE
1989-05-26	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN
1989-07-12	18W	Application withdrawn	Withdrawal date: 19890517
2007-08-08	RIN1	Information on inventor provided before grant (corrected)	Inventor name: HIGGINS, GEORGE

Publication	Publication Date	Title
DE3711636C2 (de)	1995-03-16	Verfahren zur Strahlbehandlung von Eisen- oder Stahloberflächen
DE3118375C2 (fr)	1989-06-15
EP0056881B1 (fr)	1986-02-12	Procédé pour la phosphatation de métaux
EP0187917B1 (fr)	1988-12-28	Procédé pour la protection anticorrosive de couches de résine déposées autophorétiquement sur surfaces métalliques
DE3629382A1 (de)	1987-03-05	Verfahren zur erzeugung von konversionsschichten auf zink und/oder zinklegierungen
DE2428065A1 (de)	1975-01-02	Versiegelnde spuelung fuer phosphatueberzuege auf metallen
WO2001059181A2 (fr)	2001-08-16	Anticorrosif et procede de protection contre la corrosion destine a des surfaces metalliques
EP0036689B1 (fr)	1984-07-04	Procédé pour l'application de revêtements phosphatés
EP0327153B1 (fr)	1993-08-04	Procédé pour former des couches de phosphates sur des métaux
DE2711429A1 (de)	1977-09-22	Verfahren zur reinigung von zinn- oberflaechen
DE69119138T2 (de)	1996-08-14	Verfahren zur Phosphatierung von Metalloberflächen
DE3307158A1 (de)	1984-09-06	Verfahren zur aktivierung der phosphatschichtausbildung auf metallen und mittel zur durchfuehrung solcher verfahren
WO2001006035A1 (fr)	2001-01-25	Procede de traitement contre la corrosion ou de traitement posterieur de surfaces metalliques
DE2701321C2 (fr)	1987-06-11
EP0039093B1 (fr)	1983-11-16	Procédé de phosphatation des surfaces de métaux et application de ce procédé
DE19749508A1 (de)	1999-05-12	Korrosionsschutz von verzinkten und legierungsverzinkten Stahlbändern
DE2123966C3 (de)	1980-03-13	Verfahren zur Phosphatierung von Eisen- und Stahloberflächen
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