Environmental aspects of the coil coating process
Coil coating is a highly industrialised process. As with any process, there are inputs and outputs and there are environmental impacts of these. Inputs to the process include metal substrates, paint, pre-treatment chemicals, water and of course energy. Outputs include solid waste, effluent and vapour emissions in addition to the product itself.
Prepainted metal production has developed over the last 40 years into a very clean process. Most installations are of a size which requires permitting under various European regulations and so the coil coating process is carried out under very tightly controlled conditions. Unlike many smaller post-coating operations, this provides an assured level of environmental standards to at least those regulated for at a European level.
The environmental impacts of the coil coating process include:
Whilst some coatings can include harmful elements, the prepainted metal industry has continually evolved the coatings it uses to eliminate these. Most coatings are now produced without harmful heavy metals or hazardous solvents. Phthalate plasticisers responsible for endocrine disruption have been phased out.