US2298280A - Treatment of metal - Google Patents

Treatment of metal Download PDF

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Publication number
US2298280A
US2298280A US384541A US38454141A US2298280A US 2298280 A US2298280 A US 2298280A US 384541 A US384541 A US 384541A US 38454141 A US38454141 A US 38454141A US 2298280 A US2298280 A US 2298280A
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United States
Prior art keywords
coating
solution
phosphate
metal
hydroxylamine
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 - Lifetime
Application number
US384541A
Inventor
Clifford Wilfred James
Adams Henry Heward
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.)
Parker Rust Proof Co
Original Assignee
Parker Rust Proof Co
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
Priority claimed from US254238A external-priority patent/US2295545A/en
Application filed by Parker Rust Proof Co filed Critical Parker Rust Proof Co
Priority to US384541A priority Critical patent/US2298280A/en
Application granted granted Critical
Publication of US2298280A publication Critical patent/US2298280A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C23C22/12—Orthophosphates containing zinc cations
    • 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
    • C23C22/18—Orthophosphates containing manganese cations

Definitions

  • This invention relates to the treatment of metals, especially iron or steel, for instance to the treatment of metals with phosphate coating solutions in order to improve the resistance of the meals to corrosion or to provide a corrosion-resisting base for paints.
  • phosphate and similar coating solutions may be applied to the metal in any suitable manner, for instance by spraying, brushing, flowing or immersion methods.
  • the cleaned steel sheet in the examples given below is a steel sheet in its original bright rolled condition rendered substantially free from grease by wiping with clean white spirit.
  • hydroxylamine may be the only accelerator' present in a coating bath, it may also be employed in conjunction with other accelerators, for instance metallic accelerators such as copper compounds or oxidizing agents such as nitrates or nitrites.
  • metallic accelerators such as copper compounds or oxidizing agents such as nitrates or nitrites.
  • nitrates or nitrites The presence of'copper ions appears to promote heavier and darker coatings, and the presence of a nitrate such as zinc nitrate appears to give a slight further acceleration.
  • the optimum concentration of the accelerating compound in the reagent attacking the metal surfaces differs with different compounds but in the case of phosphate coating solutions is in general from about .0l% to.4% by weight of the solution. Too much or too little of the accelerating compound may be detrimental to good results.
  • Example 1 A cleaned steel sheet can be successfully coated by treating it with an N/5 solution of zinc dihydrogen phosphate (determined by phenol-- phthalein) containing 0.4% of hydroxylamine, at a temperature of C. 2
  • Example 2 A cleaned steel sheet can be successfully coated by treating it at a temperature of 15 to 80 C. with an N/5 solution of manganese dihydrogen phosphate (determined by phenol-phthalein) containing 0.4% of hydroxylamine.
  • a process which comprises treating ferrous surfaces with a zinc phosphate coating solution accelerated by hydroxylamine until a corrosionresistant paint-holding coating is obtained.

Description

Patented Oct. 13, .1942
2,298,280 I TREATMENT or METAL Wilfred James Clifford and Henry Heward Adams,
Brentford, England, assignors to Parker Rust- Proof Company, Detroit of Michigan No Drawing.
Original a 1939, Serial No. 254,238.
, Mich., a corporation pplication February 2,
Divided and this a'pplication March 21, 1941, Serial No. 384,541. In Great Britain February 4, 1938 Claims.
This invention relates to the treatment of metals, especially iron or steel, for instance to the treatment of metals with phosphate coating solutions in order to improve the resistance of the meals to corrosion or to provide a corrosion-resisting base for paints.
It is an object of the invention to accelerate the action of reagents which attack a metal surface.
It is a further object of the invention to accelerate the action of phosphate coating solutions, i. e., to reduce the time taken by the coating solution to form a complete coating,- or to reduce the temperature, or to obtain a better coating in a given time under given conditions than if the compounds were not present.
Where phosphate and similar coating solutions are being employed, they may be applied to the metal in any suitable manner, for instance by spraying, brushing, flowing or immersion methods.
We have found that the action of' reagents which attack metal surfaces, and especially phosphate coating solutions, can be accelerated by incorporating hydroxylamine therein.
The cleaned steel sheet in the examples given below is a steel sheet in its original bright rolled condition rendered substantially free from grease by wiping with clean white spirit.
While the hydroxylamine may be the only accelerator' present in a coating bath, it may also be employed in conjunction with other accelerators, for instance metallic accelerators such as copper compounds or oxidizing agents such as nitrates or nitrites. The presence of'copper ions appears to promote heavier and darker coatings, and the presence of a nitrate such as zinc nitrate appears to give a slight further acceleration.
The optimum concentration of the accelerating compound in the reagent attacking the metal surfaces differs with different compounds but in the case of phosphate coating solutions is in general from about .0l% to.4% by weight of the solution. Too much or too little of the accelerating compound may be detrimental to good results.
The invention is illustrated by the followinir examples:
Example 1 A cleaned steel sheet can be successfully coated by treating it with an N/5 solution of zinc dihydrogen phosphate (determined by phenol-- phthalein) containing 0.4% of hydroxylamine, at a temperature of C. 2
Example 2 A cleaned steel sheet can be successfully coated by treating it at a temperature of 15 to 80 C. with an N/5 solution of manganese dihydrogen phosphate (determined by phenol-phthalein) containing 0.4% of hydroxylamine.
If in any of the above examples 0.001% of copper (calculated as the metal) is added to the solution, for instance. in the form of the nitrate or carbonate, a darker and slightly heavier coating is obtained, and the addition of zinc nitrat results in a slightly further acceleration.
What we claim is: 1
1. A coating solution containing a coating acid phosphate and hydroxylamine in an amount that accelerates the coating action of the solution.
2. A coating solution containing zinc coating acid phosphate and hydroxylamine in an amount that accelerates the coating action of the solution.
3. The process which comprises treating ferrous surfaces with a phosphate coating solution, the action of which is accelerated by hydroxylamine until a corrosion-resistant paintholding coating is obtained.
4. A process which comprises treating ferrous surfaces with a zinc phosphate coating solution accelerated by hydroxylamine until a corrosionresistant paint-holding coating is obtained.
5. The process which comprises dissolving in a solution materials comprisin hydroxylamine and the ingredients of a coating acid phosphate in amounts resulting in an accelerated phosphate coating bath, and treating a ferrous surface with the solution until a phosphate coating is formed upon said surface.
' WILFRED JAMES CLIFFORD.
HENRY. HEWARD ADAMS.
US384541A 1939-02-02 1941-03-21 Treatment of metal Expired - Lifetime US2298280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US384541A US2298280A (en) 1939-02-02 1941-03-21 Treatment of metal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US254238A US2295545A (en) 1938-02-04 1939-02-02 Treatment of metal
US384541A US2298280A (en) 1939-02-02 1941-03-21 Treatment of metal

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702768A (en) * 1948-07-23 1955-02-22 Parker Rust Proof Co Ferrous surface coating process using alkali metal phosphates and hydroxylamines
US2737498A (en) * 1946-07-12 1956-03-06 Produits Chim Terres Rares Soc Product for and process of treating metallic articles before coating
US2743204A (en) * 1952-08-28 1956-04-24 Parker Rust Proof Co Phosphate metal coatings
US2826517A (en) * 1954-01-11 1958-03-11 Kelite Products Inc Process and composition for phosphatizing steel
US2928762A (en) * 1955-08-09 1960-03-15 Neilson Chemical Company Phosphate coating of metals
US3129121A (en) * 1962-04-04 1964-04-14 Amchem Prod Phosphate coating solution and method of coating ferriferous metal
US3839099A (en) * 1972-07-27 1974-10-01 Amchem Prod Iron-phosphate coating for tin-plated ferrous metal surfaces
US4143205A (en) * 1976-10-05 1979-03-06 Diamond Shamrock Corporation Phosphatized and painted metal articles
US4149909A (en) * 1977-12-30 1979-04-17 Amchem Products, Inc. Iron phosphate accelerator
GB2169620A (en) * 1984-12-20 1986-07-16 Parker Chemical Co Phosphate coatings
US5234509A (en) * 1984-12-20 1993-08-10 Henkel Corporation Cold deformation process employing improved lubrication coating
US5261973A (en) * 1991-07-29 1993-11-16 Henkel Corporation Zinc phosphate conversion coating and process
US5588989A (en) * 1994-11-23 1996-12-31 Ppg Industries, Inc. Zinc phosphate coating compositions containing oxime accelerators
US5653790A (en) * 1994-11-23 1997-08-05 Ppg Industries, Inc. Zinc phosphate tungsten-containing coating compositions using accelerators
US6179934B1 (en) * 1997-01-24 2001-01-30 Henkel Corporation Aqueous phosphating composition and process for metal surfaces
US6368426B1 (en) * 1991-07-29 2002-04-09 Henkel Corporation Zinc phosphate conversion coating and process
US20030155042A1 (en) * 2001-12-13 2003-08-21 Richard Church Use of substituted hydroxylamines in metal phosphating processes

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737498A (en) * 1946-07-12 1956-03-06 Produits Chim Terres Rares Soc Product for and process of treating metallic articles before coating
US2702768A (en) * 1948-07-23 1955-02-22 Parker Rust Proof Co Ferrous surface coating process using alkali metal phosphates and hydroxylamines
US2743204A (en) * 1952-08-28 1956-04-24 Parker Rust Proof Co Phosphate metal coatings
US2826517A (en) * 1954-01-11 1958-03-11 Kelite Products Inc Process and composition for phosphatizing steel
US2928762A (en) * 1955-08-09 1960-03-15 Neilson Chemical Company Phosphate coating of metals
US3129121A (en) * 1962-04-04 1964-04-14 Amchem Prod Phosphate coating solution and method of coating ferriferous metal
US3839099A (en) * 1972-07-27 1974-10-01 Amchem Prod Iron-phosphate coating for tin-plated ferrous metal surfaces
US4143205A (en) * 1976-10-05 1979-03-06 Diamond Shamrock Corporation Phosphatized and painted metal articles
US4149909A (en) * 1977-12-30 1979-04-17 Amchem Products, Inc. Iron phosphate accelerator
JPS61157684A (en) * 1984-12-20 1986-07-17 パーカー・ケミカル・カンパニー Cold processing for adapting improved lubricating phosphate film
GB2169620A (en) * 1984-12-20 1986-07-16 Parker Chemical Co Phosphate coatings
JPH0465151B2 (en) * 1984-12-20 1992-10-19 Parker Chemical Co
US5234509A (en) * 1984-12-20 1993-08-10 Henkel Corporation Cold deformation process employing improved lubrication coating
US5261973A (en) * 1991-07-29 1993-11-16 Henkel Corporation Zinc phosphate conversion coating and process
US6368426B1 (en) * 1991-07-29 2002-04-09 Henkel Corporation Zinc phosphate conversion coating and process
US5588989A (en) * 1994-11-23 1996-12-31 Ppg Industries, Inc. Zinc phosphate coating compositions containing oxime accelerators
US5653790A (en) * 1994-11-23 1997-08-05 Ppg Industries, Inc. Zinc phosphate tungsten-containing coating compositions using accelerators
US6179934B1 (en) * 1997-01-24 2001-01-30 Henkel Corporation Aqueous phosphating composition and process for metal surfaces
US20030155042A1 (en) * 2001-12-13 2003-08-21 Richard Church Use of substituted hydroxylamines in metal phosphating processes
EP1453989A1 (en) * 2001-12-13 2004-09-08 Henkel Kommanditgesellschaft auf Aktien Use of substituted hydroxylamines in metal phosphating processes
EP1453989A4 (en) * 2001-12-13 2005-03-23 Henkel Kgaa Use of substituted hydroxylamines in metal phosphating processes
US7294210B2 (en) 2001-12-13 2007-11-13 Henkel Kommanditgesellschaft Auf Aktien Use of substituted hydroxylamines in metal phosphating processes

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