| Autor: |
Critchlow, G. W., Bedwell, K. H., Cottam, C. A. |
| Zdroj: |
Transactions of the Institute of Metal Finishing; January 1998, Vol. 76 Issue: 5 p203-206, 4p |
| Abstrakt: |
SummaryTEA CO2-laser ablation has been studied to establish its effectiveness for the cleaning of hot dipped galvanised (HDG) mild steel. This laser-based process was demonstrated to be more effective than double-degreasing for the removal of organic contamination from a previously oily surface. In addition, the TEA CO2-laser was shown to modify both the near surface chemistry and the topography; the precise modifications being dependent upon the degree of treatment used.In bond durability trials, the changes introduced to the laser-treated HDG surface were shown to provide equivalent or better joints compared with degreased adherends. In the same durability trials, a commercially-available phosphate-based, wet chemical treatment was shown to provide bond durability significantly inferior to the TEA CO2-laser. In contrast, a chromate-based process gave markedly superior bond durability. Possible explanations for the bond test results have been given. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
