| Résumé : |
Coating systems are very complex and LCA studies require careful setting up. Definition of the functional unit in terms of articles or coated area, with statements on performance (including durability) is necessary.
- A system approach is preferred, which takes account of multiple coats, and pre and post treatments (e.g., in service replacement/repair).
- A fair basis for comparison is needed for a credible study, attention must be given to data quality issues.
- Emissions are best grouped according to major contributory cause (sub-system/process).
- Where trade-offs are identified, emission control options are difficult to justify and need to be approached with caution.
- Steps taken to reduce certain emissions will not increase others, E.g., containment ; these changes are easy to justify.
- Environmental burdens from high-solids and wtaer based coatings tend to converge as solids levels increase, differences become less significant.
- Cost benefit analysis indicates that high solids systems should be seen as an end-point technology, not as a stop-gap. |
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Using LCA to select coatings for optimum environmental and cost performance in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 861 (10/1996)
