http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2023663-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5ce7bde1bc2d14324c60b4b689690280 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-13 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-362 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-184 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-13 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-36 |
| filingDate | 1990-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1998-11-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7dfe463f17288c46df97ee31ec4bdd86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bd0a9ff3cc1c78ea38869394cf938a90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c8099a2b4bcf37818118851ba213b806 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6add0739b4e6a08fac622adce78a9752 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ee4dbcaac76e935d2055f40fd940bce5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_efa929fb3801ea4f332d2610dab53067 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6fd7957509045a1ecb2bbf85505da20f |
| publicationDate | 1998-11-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2023663-C |
| titleOfInvention | Process of forming phospate coatings on metal surfaces |
| abstract | A process of forming phosphate coatings on metal surfaces by a treatment with aqueous iron(II) and nitrate ions-containing zinc phosphate solutions can be carried out without a formation of waste water if metal surfaces are contacted with a phosphating solution which contains: 0.4 to 30 g/l Zn, 4 to 30 g/l P205, 5 to 50 g/l N03, from greater than 0 to 10 g/l Fe(II), and from greater than 0 to 0.3 g/l Fe(III) and in which the weight ratio of free P205 to total P2O5 = (0.04 to 0.50) : 1 and which is replenished with Zn, NO3 and P2O5 in a weight ratio of: Zn : NO3 : P205 = (0.80 to 0.30) : (0.17 to 0.4) : 1 and in which the Fe(II) content is adjusted only by an oxidation with nitrate or nitrite derived from nitrate, nitrite derived from nitrate, employed optionally together with an oxygen-containing gas, H202 and/or nitrous gases, the phosphating bath is succeeded by a cascade of at least two rinsing baths, low-salt water or salt-free water is fed to that rinsing bath which is the last in the direction of travel of the workpieces, the overflowing water is fed to the next preceding rinsing bath and to the phosphating bath, respectively, and low-salt or salt-free water is withdrawn from the phosphating bath at least at such a rate that the phosphate-enriched rinsing water form the cascade can be fed to the phosphating bath. |
| priorityDate | 1989-08-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 66.