DE691596C - Process for internal galvanizing of pipes made of steel or iron - Google Patents
Process for internal galvanizing of pipes made of steel or ironInfo
- Publication number
- DE691596C DE691596C DE1937H0150745 DEH0150745D DE691596C DE 691596 C DE691596 C DE 691596C DE 1937H0150745 DE1937H0150745 DE 1937H0150745 DE H0150745 D DEH0150745 D DE H0150745D DE 691596 C DE691596 C DE 691596C
- Authority
- DE
- Germany
- Prior art keywords
- galvanizing
- iron
- steel
- internal
- pipes
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 9
- 238000005246 galvanizing Methods 0.000 title claims description 7
- 229910000831 Steel Inorganic materials 0.000 title claims description 5
- 229910052742 iron Inorganic materials 0.000 title claims description 5
- 239000010959 steel Substances 0.000 title claims description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 238000005554 pickling Methods 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims 1
- 150000004679 hydroxides Chemical class 0.000 claims 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Description
Verfahren zum Innenverzinken von Rohren aus Stahl oder Eisen Es ist in vielen Fällen unnötig bzw.unerwünscht. Rohre aus Eisen oder Stahl beiderseitig zu verzinken. Dies trifft z. B. zu bei a11 den Rohren, die als Wasserleitungsrohre unter Putz verlegt werden. Da diese Rohre außen keinem Angriff ausgesetzt sind, genügt es vollständig, wenn diese Rohre nur innen verzinkt sind. Man hat nun schon auf die verschiedenste Art versucht, eine einseitige Verzinkung zu erreichen, aber allen diesen Verfahren haften erhebliche Mängel an. Bringt man z. B. eine dicke feste Schicht eines aufschlämmbaren Stoffes auf, so besteht die Gefahr, daß die Schicht .infolge ihrer geringen mechanischen Festigkeit beim Transport beschädigt wird oder bei Einführen in das Zinkbad infolge der auftretenden Wärmespannungen abplatzt und dem Zink den Zutritt zu dieser Stelle gestattet. Es ist ferner bekannt, auf zu verzinkende Gegenstände nach vorhergehendem Beizen und Wässern einen wasserlöslichen, hochsiedenden Alkohol, z. B. Glycerin, aufzubringen, die Gegenstände auf Temperaturen zwischen äoo und 3oo° C zii erhitzen, an den zu verzinkenden Stellen mit einem Flußmittel zu belegen und dann .in das Zinkbad zu tauchen. Bei diesem Verfahren wird jedoch ein hochwertiger Kohlenwasserstoff verbraucht; wodurch das Verfahren für den Großbetrieb unwirtschaftlich wird. Es ist auch vorgeschlagen worden, die Röhre an der einen Seite mit einer Kappe zu verschließen, an der anderen Seite mit einem Trichter zu versehen und dann nach Erwärmen auf Verzinkungstemperatur mit Zink zu füllen. Für spezielle Fälle ist ferner vorgeschlagen worden, das Zink durch Abbeizen wieder zu beseitigen. Aber alle diese Vorschläge haben für den Großbetrieb keine Bedeutung erlangt.Process for internal galvanizing of pipes made of steel or iron It is in many cases unnecessary or undesirable. Iron or steel pipes on both sides to galvanize. This applies e.g. B. to at a11 the pipes that are used as water pipes be laid under plaster. Since these pipes are not exposed to any external attack, it is completely sufficient if these pipes are only galvanized on the inside. You already have tried in various ways to achieve a one-sided galvanization, but all of these processes have significant shortcomings. If you bring z. B. a thick one solid layer of a slurryable substance, there is a risk that the Layer damaged during transport due to its low mechanical strength or when introduced into the zinc bath as a result of the thermal stresses that occur flakes off and allows the zinc access to this point. It is also known on objects to be galvanized after previous pickling and soaking a water-soluble, high boiling alcohol, e.g. B. glycerin to apply the objects to temperatures Heat between 100 and 300 ° C zii, at the points to be galvanized with a flux to cover and then to immerse in the zinc bath. However, with this procedure a high quality hydrocarbon consumed; thereby making the procedure for large farms becomes uneconomical. It has also been suggested to attach the tube to one Close the side with a cap and the other side with a funnel provided and then filled with zinc after heating to galvanizing temperature. For Special cases have also been suggested to restore the zinc by stripping to eliminate. But none of these suggestions are relevant for large-scale operations attained.
Demgegenüber wird gemäß der Erfindung ein Verfahren zur Innenverzink ung von Rohren aus Eisen oder Stahl vorgeschlagen, bei dem die in üblicher Weise gebeizten und innen bzw. innen und außen mit einem Flußmittel versehenen Rohre an der nicht zu verzinkenden Außenseite mit einer Lösung der Hydr- Oxyde der Alkali- bzw. Erdalkalimetalle behandelt, getrocknet und feuerverzinkt werden. Die Lösungen können in -irgendeiner geeigneten Weise, z. B. durch Pinsel, aufgebracht,, werden. Besonders vorteilhaft ist es, die Lölx sungen aufzuspritzen. Dies ist ohne weitere" möglich, da die Lösungen klar; d. h. ohne Gehalt .an aufgeschlämmten Teilchen *# @deri Ausgangsstoffe, verwendet werden. Die auf gebrachte Schicht kann so dünn gehalten werden, daß sie nicht mehr wahrnehmbar ist; es ist lediglich erforderlich, für genügende Basizität Sorge zu tragen.In contrast, according to the invention, a method for internal galvanizing Unction of pipes made of iron or steel proposed, in which the in the usual way pickled and inside or inside and outside provided with a flux pipes the outside, which is not to be galvanized, with a solution of the Oxides the alkali or alkaline earth metals are treated, dried and hot-dip galvanized. The solutions can be prepared in any suitable manner, e.g. B. by brush, applied, will. It is particularly advantageous to spray the Lölx solutions on. This is without further "possible, since the solutions are clear; i.e. without content of suspended particles * # @deri starting materials are used. The applied layer can be so thin be held so that it is no longer perceptible; it is only necessary to ensure sufficient basicity.
Das neue Verfahren zeichnet sich durch außerordentliche Wohlfeilheit und einwandfreie Ergebnisse aus. Es ist ohne weiteres in den normalen Verzinkungsgang einzuschalten, und es haben sich bei der Verzinkung keinerlei Schwierigkeiten ergeben.The new process is extremely cheap and perfect results. It is readily available in the normal galvanizing process and there were no problems whatsoever with the galvanization.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1937H0150745 DE691596C (en) | 1937-02-23 | 1937-02-23 | Process for internal galvanizing of pipes made of steel or iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1937H0150745 DE691596C (en) | 1937-02-23 | 1937-02-23 | Process for internal galvanizing of pipes made of steel or iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE691596C true DE691596C (en) | 1940-05-31 |
Family
ID=7180990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1937H0150745 Expired DE691596C (en) | 1937-02-23 | 1937-02-23 | Process for internal galvanizing of pipes made of steel or iron |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE691596C (en) |
-
1937
- 1937-02-23 DE DE1937H0150745 patent/DE691596C/en not_active Expired
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