http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2029438-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d70f9e00d30fd9741066dc851b54482a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25D11-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25D11-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25D11-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25D11-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25D11-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25D11-12 |
| filingDate | 1990-11-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2001-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_197e0fb0f66aaecf93c1dab2841bb292 |
| publicationDate | 2001-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2029438-C |
| titleOfInvention | Process for electrolytically treating aluminium and aluminium alloys |
| abstract | A process for providing a variety of light to medium colours of anodised aluminium or aluminium alloys which comprises the steps of anodising an aluminium or aluminium alloy workpiece in an aqueous strong acid electrolyte solution by application of direct current to form on the workpiece a porous anodic oxide film having a thickness of at least about 3 microns; subjecting the resulting anodised workpiece to alternating current in an aqueous strong acid electrolyte solution comprising an organic carboxylic acid containing at least one reactive group bound to the carbon atom in the alpha-position; and electrolyti-cally colouring the workpiece. In a preferred embodiment resulting in deepened colour tones, including those in the blue to blue-gray range, one or more currentless "waiting periods" are maintained at various stages of the process. In another embodiment, improved colour uniform-ity is obtained by subjecting the workpiece prior to electrolytic colouring to a direct current pre-treatment step. The resulting electrolytically coloured aluminium or aluminium alloy is particularly useful for architectural product. |
| priorityDate | 1989-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 43.