Method for evaluating corrosion resistance of cans to contents
US8906212B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2012 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Apr 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method to evaluate the corrosion resistance of a can to a content includes filling the can with the content to form a specimen, setting the specimen in an apparatus capable of blocking an outside atmosphere from entering the specimen, optionally saturating the content with nitrogen gas to expel dissolved oxygen present in the content, thereafter while maintaining the temperature of the content at a constant temperature in the range of 25 to 60° C., applying a constant potential that is more anodic than an immersion potential by 50 mV to 200 mV to the can of the specimen, and evaluating the corrosion resistance of the can to the content based on the accumulated amount of electricity generated during a time appropriately selected from 6 to 48 hours immediately after the application of the constant potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.