Can composed of electrolytically chromated steel
US4296182A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1979 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | May 1, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31688
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A can at least a part of which is made of an electrolytically chromated steel sheet, said steel sheet having such a surface that when it is degreased in acetone for 1 minute and analyzed by an Auger electron spectrometer at an incident electron accelerating voltage of 3 KeV, a modulation voltage of 3 V, a modulation frequency of 12 to 20 KHz and a degree of vacuum of at least 6.times.10.sup.-8 torr, the ratio of the peak-peak distance (O.sub.P-P) of KL.sub.2.3 L.sub.2.3 of oxygen to the base-peak distance (Cr.sub.B-P) of L.sub.3 M.sub.2.3 M.sub.4.5 of chromium in the resulting Auger electron spectrum satisfies the following relation: EQU 6.5.gtoreq.(O.sub.P-P)/(Cr.sub.B-P).gtoreq.1.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.