DE1283418B - Process for improving the corrosion-inhibiting properties of red lead or less soluble chromate pigments - Google Patents

Process for improving the corrosion-inhibiting properties of red lead or less soluble chromate pigments

Info

Publication number
DE1283418B
DE1283418B DEA34517A DEA0034517A DE1283418B DE 1283418 B DE1283418 B DE 1283418B DE A34517 A DEA34517 A DE A34517A DE A0034517 A DEA0034517 A DE A0034517A DE 1283418 B DE1283418 B DE 1283418B
Authority
DE
Germany
Prior art keywords
corrosion
improving
red lead
inhibiting properties
less soluble
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.)
Pending
Application number
DEA34517A
Other languages
German (de)
Inventor
Ans Dr-Ing Jean D
Dr-Ing Viggo A Groope
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.)
JEAN D ANS DR ING
VIGGO A GROOPE DR ING
Original Assignee
JEAN D ANS DR ING
VIGGO A GROOPE DR ING
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.)
Filing date
Publication date
Application filed by JEAN D ANS DR ING, VIGGO A GROOPE DR ING filed Critical JEAN D ANS DR ING
Priority to DEA34517A priority Critical patent/DE1283418B/en
Publication of DE1283418B publication Critical patent/DE1283418B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/34—Compounds of chromium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/14—Compounds of lead
    • C09C1/16—White lead
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/14—Compounds of lead
    • C09C1/18—Red lead
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/14—Compounds of lead
    • C09C1/20—Lead chromate

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)

Description

Verfahren zum Verbessern der korrosionshemmenden Eigenschaften von Mennige oder weniger löslichen Chromat-Pigmenten Es ist gefunden worden, daß nicht korrosionshemmend wirkende Chromate, wie z. B. Bleichromat, basische Bleichromat und Bariumchromat, durch Zusatz wenig löslicher Erdalkalimonohydrogenorthophosphate in dem Maße aktiviert werden, daß sie ausgezeichnete korrosionshemmende Eigenschaften erlangen.Process for improving the corrosion-inhibiting properties of Red lead or less soluble chromate pigments have been found not to corrosion-inhibiting chromates, such as B. lead chromate, basic lead chromate and barium chromate, by adding slightly soluble alkaline earth monohydrogen orthophosphates are activated to the extent that they have excellent corrosion-inhibiting properties gain.

Es ist dabei weiterhin gefunden worden, daß auch der Schutz durch die an sich schon befriedigend wirkenden Chromate, z. B. die basischen Zinkchromate, durch einen Zusatz an solchen Phosphaten noch verbessert wird. Es wird dadurch die Empfindlichkeit der gebildeten Schutzschichten gegen schädigende Anionen weitgehend zurückgedrängt.It has also been found that the protection by the chromates, which are already satisfactory in themselves, z. B. the basic zinc chromates, is further improved by adding such phosphates. It becomes the Sensitivity of the protective layers formed to damaging anions to a large extent pushed back.

Es ist bekannt, daß der Korrosionsschutz durch Chromate durch kleinste Mengen an Halogenionen, Sulfationen oder auch größere Konzentrationen an Phosphationen geschädigt wird. Es ist daher besonders beachtlich, daß erfindungsgemäß gefunden worden ist, daß wenig lösliche Erdalkalimonohydrogenorthophosphate, wie z. B. CaHPO4 . 2 H.,0, CaHP043 MgHPO, - 3 H.,0, eine auffallende Verl;esserung des Korrosionsschitzes ergeben.It is known that the corrosion protection provided by chromates is damaged by the smallest amounts of halogen ions, sulfate ions or even larger concentrations of phosphate ions. It is therefore particularly noteworthy that it has been found according to the invention that sparingly soluble alkaline earth monohydrogen orthophosphates, such as. B. CaHPO4 . 2 H., 0, CaHP043 MgHPO, - 3 H., 0, result in a noticeable increase in the corrosion zone.

Diese erfindungsgemäße Feststellung gilt auch für andere korrosionsverhütende oxydierende Pigmente, wie Mennige.This finding according to the invention also applies to other anti-corrosive agents oxidizing pigments such as red lead.

Das Verfahren ist nicht beschränkt auf die genannten Pigmente in reinem Zustand, sondern ist auch anwendbar bei Mischpigmenten, wie z. B. Mischungen von Mennige mit Bariumsulfat oder Eisenglimmer.The method is not limited to the pigments mentioned in pure form State, but is also applicable to mixed pigments, such as. B. Mixtures of Red lead with barium sulfate or iron mica.

Für den Korrosionssehutz sind bereits Verfahren bekannt, die sich einiger Metallphosphate als Pigment bedienen. Der vorgeschlagene Zusatz von Chrom(III)-phosphat oder Bleiphosphat zu Wash-Primern fällt nicht unter das Patentbegehren, da die Wash-Primer freie Phosphorsäure in erheblichen Mengen enthalten, die für das erfindungsgemäße Verfahren schädlich ist.Processes are already known for corrosion protection use some metal phosphates as a pigment. The proposed addition of chromium (III) phosphate or lead phosphate to wash primers is not covered by the patent application because the wash primer Contain free phosphoric acid in significant amounts for the inventive Procedure is harmful.

Es ist ferner bekannt, Eisenphosphate (deutsche Patentschrift 710 908), Thomasschlacke (deutsche Patentschrift 900 370) und Eisen-, Mangan- oder Zinkphosphate (USA.-Patentschrift 2 568 424) als Pigment zu verwenden. Ihre rostschützende Wirkung beruht darauf, daß sie mit dem Untergrund reagieren und Deckschichten bilden.It is also known, iron phosphates (German Patent 710,908), Thomas slag (German Patent 900,370), and iron, manganese or zinc phosphates (USA. Patent 2,568,424) to use as a pigment. Their rust-protecting effect is based on the fact that they react with the subsurface and form top layers.

Zum Rostschutz sind auch Verfahren bekannt, die sich der Phosphorsäure bedienen. Der Schutz beruht auf der Einwirkung der Phosphorsäure oder der primären Phosphate auf das metallische Eisen, wobei sich Eisenphosphate oder Eisen-Metall-Doppelphosphate bilden, die eine auf dem Metall festhaftende Schicht bilden, auf der dann Anstriche oder Einbrennlacke gut haften. Die gleiche Aufgabe hat die Phosphorsäure in den sogenannten Wash-Primem. Von diesen Schutzverfahren unterscheidet sich das vorliegende wesentlich dadurch, daß die zu verwendenden wenig löslichen Erdalkalimonohydrogenorthophosphate das metallische Eisen nicht anzugreifen vermögen, sich jedoch mit den Chromaten oder der Mennige umsetzen und deren Löslichkeit und damit Schutzwirkung erhöhen. Beispiel 1 Das Pigment besteht aus einer Mischung von 95 bis 60Teilen Blei- oder Bariumchromat mit 5 bis 40 Teilen Calcium- oder Magnesiummonohydrogenorthoposphat.Processes which use phosphoric acid are also known for rust protection. The protection is based on the action of phosphoric acid or primary phosphates on the metallic iron, with iron phosphates or iron-metal double phosphates forming, which form a layer that adheres to the metal, to which paints or stoving enamels then adhere well. The phosphoric acid has the same task in the so-called wash primers. The present one differs from these protective methods essentially in that the slightly soluble alkaline earth monohydrogen orthophosphates to be used are unable to attack the metallic iron, but react with the chromates or red lead and increase their solubility and thus their protective effect. Example 1 The pigment consists of a mixture of 95 to 60 parts of lead or barium chromate with 5 to 40 parts of calcium or magnesium monohydrogen orthoposphate.

Beispiel 11 Das Pigment besteht aus 95 bis 70Teilen bas. Zinkehromat und 5 bis 30 Teilen eines Caleiummonohydrogenorthophosphates.Example 11 The pigment consists of 95 to 70 parts bas. Zinkehromat and 5 to 30 parts of a calcium monohydrogen orthophosphate.

Beispiel 111 Das Pigment besteht aus 50 und mehr Anteilen an Mennige und 50 oder weniger Gewichtsanteilen eines Calcium- oder Magnesiummonohydrogenorthophosphates.Example 111 The pigment consists of 50 or more parts of red lead and 50 or less parts by weight of a calcium or magnesium monohydrogen orthophosphate.

Claims (1)

Patentanspruch-. Verfahren zum Verbessern der korrosionshemmenden Eigenschaften von Mennige oder wenig löslichen Chromat-Pigmenten, insbesondere Blei-, Zink- oder Bariumehromaten, in Anstrichen, dadurch gekennzeichnet, daß man den Pigmenten wenig lösliche Erdalkalimonohydrogenorthophosphate, vorzugsweise Caleiummonohydrogenorthophosphat, zusetzt. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 680 199; USA.-Patentschriften Nr. 2 385 800, 2 568 424.Claim-. Process for improving the corrosion-inhibiting properties of red lead or sparingly soluble chromate pigments, in particular lead, zinc or barium chromates, in paints, characterized in that sparingly soluble alkaline earth monohydrogen orthophosphates, preferably potassium monohydrogen orthophosphate, are added to the pigments. Documents considered: German Patent No. 680 199; USA. Patent Nos. 2,385,800, 2,568,424.
DEA34517A 1960-04-28 1960-04-28 Process for improving the corrosion-inhibiting properties of red lead or less soluble chromate pigments Pending DE1283418B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA34517A DE1283418B (en) 1960-04-28 1960-04-28 Process for improving the corrosion-inhibiting properties of red lead or less soluble chromate pigments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA34517A DE1283418B (en) 1960-04-28 1960-04-28 Process for improving the corrosion-inhibiting properties of red lead or less soluble chromate pigments

Publications (1)

Publication Number Publication Date
DE1283418B true DE1283418B (en) 1968-11-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEA34517A Pending DE1283418B (en) 1960-04-28 1960-04-28 Process for improving the corrosion-inhibiting properties of red lead or less soluble chromate pigments

Country Status (1)

Country Link
DE (1) DE1283418B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960611A (en) * 1973-12-13 1976-06-01 Albright & Wilson Limited Coating compositions with magnesium phosphate pigment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE680199C (en) * 1935-12-11 1939-08-22 Theodor Broch Unger Primer
US2385800A (en) * 1941-02-27 1945-10-02 American Chem Paint Co Paint
US2568424A (en) * 1949-04-20 1951-09-18 Tennessee Coal Iron And Railro Coating composition for protecting metal surfaces from corrosion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE680199C (en) * 1935-12-11 1939-08-22 Theodor Broch Unger Primer
US2385800A (en) * 1941-02-27 1945-10-02 American Chem Paint Co Paint
US2568424A (en) * 1949-04-20 1951-09-18 Tennessee Coal Iron And Railro Coating composition for protecting metal surfaces from corrosion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960611A (en) * 1973-12-13 1976-06-01 Albright & Wilson Limited Coating compositions with magnesium phosphate pigment

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