GB970197A - Improvements in or relating to the formation of phosphate-chemical conversion coatings upon metal surfaces - Google Patents
Improvements in or relating to the formation of phosphate-chemical conversion coatings upon metal surfacesInfo
- Publication number
- GB970197A GB970197A GB13507/63A GB1350763A GB970197A GB 970197 A GB970197 A GB 970197A GB 13507/63 A GB13507/63 A GB 13507/63A GB 1350763 A GB1350763 A GB 1350763A GB 970197 A GB970197 A GB 970197A
- Authority
- GB
- United Kingdom
- Prior art keywords
- radical
- phenyl
- hydrazine
- solution
- nitrite
- 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
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
- C23C22/10—Orthophosphates containing oxidants
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
In phosphating iron and steel, the metal surface is contacted with an aqueous acidic solution of an alkali metal phosphate (the term including mono and dihydrogen phosphates of ammonia and the alkali metals) together with nitrite ions and at least 0.05 g./1. of a hydrazine compound of the general formula: <FORM:0970197/C6-C7/1> (wherein A represents hydrogen, an unsubstituted alkyl radical having from 1 to 3 carbon atoms or the phenyl radical and B represents hydrogen, the methylcarbonyl radical or the carbamyl radical). The pH of the solution is from 4.0 to 5.8 (e.g. 4.5 to 5.7) and the temperature at least 120 DEG F. (49 DEG C. approx.) (e.g. 120-150 DEG F.). The nitrite ion concentration is related to the hydrazine compound concentration by a specified formula. Specified hydrazine compounds are hydrazine, methyl-, ethyl-, propyl-, phenyl-, b aceto a phenyl-, b aceto a methyl hydrazines and semicarbazide. The nitrite may be the alkali or alkaline earth metal salt, e.g. NaNO2. The solution may include a wetting agent and may be applied by dipping, spraying or roller coating In Example I, steel panels are enamelled after phosphating.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US184961A US3129123A (en) | 1962-04-04 | 1962-04-04 | Method and solution for applying a phosphate conversion coating on ferriferous surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB970197A true GB970197A (en) | 1964-09-16 |
Family
ID=22679010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13507/63A Expired GB970197A (en) | 1962-04-04 | 1963-04-04 | Improvements in or relating to the formation of phosphate-chemical conversion coatings upon metal surfaces |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3129123A (en) |
| DE (1) | DE1281775B (en) |
| FR (1) | FR1353311A (en) |
| GB (1) | GB970197A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3333988A (en) * | 1965-12-16 | 1967-08-01 | Phosphate coating process | |
| US4298405A (en) * | 1980-03-24 | 1981-11-03 | Intex Products, Inc. | Process for producing iron phosphate coatings at ambient temperature |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE501506A (en) * | 1950-09-08 | |||
| NL106717C (en) * | 1953-06-08 |
-
1962
- 1962-04-04 US US184961A patent/US3129123A/en not_active Expired - Lifetime
-
1963
- 1963-03-30 DE DEA42768A patent/DE1281775B/en active Pending
- 1963-04-04 GB GB13507/63A patent/GB970197A/en not_active Expired
- 1963-04-04 FR FR930458A patent/FR1353311A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3129123A (en) | 1964-04-14 |
| FR1353311A (en) | 1964-02-21 |
| DE1281775B (en) | 1968-10-31 |
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