Organic solvents and surface treatment

ASSA ABLOY has reduced the consumption of chlorinated organic solvents in production thanks to investments in new cleaning technologies. ASSA ABLOY uses perchloroethylene (PER) and trichloroethylene (TRI) for surface treatment of metals. These are both identified as environmentally hazardous chemicals and ASSA ABLOY has initiated a gradual phase out of those chemicals in production.

Phasing out

The commitment to reducing the use of chlorinated organic solvents will continue with the aim to exclude them from production processes. These chemicals will, step by step, be replaced by more environmentally adapted solutions. Alternative processes are being identified and evaluated.

ASSA ABLOY measures its use of different organic solvents. Perchloroethylene (PER) has been identified as the most environmentally hazardous chemical.

Performance

The total consumption of chlorinated organic solvents was reduced by 12 percent compared with 2015. The majority of the consumption of chlorinated organic solvents in 2016 is related to companies acquired during 2014–2016. The target is to reduce the consumption of chlorinated organic solvents by 85% between 2015 and 2020.

The Group is also using other types of organic solvents primarily as solvents for paint. The total consumption of other types of organic solvents for comparable units decreased by 10.5 percent to 1,123 tons in 2016. The target is to reduce the consumption by 50 percent between 2015 and 2020,

Modern cleaning technologies for surface treatment

ASSA ABLOY uses modern cleaning technologies to streamline the process of surface treatment.
Products and their components need surface treatments to meet high standards of durability, corrosion resistance, quality and finishing.

In most cases, the surface treatment processes are highly complex and require accurate process controls. Parts are treated in sequential baths and cleaned in water tanks before each new sub process commences.

By using modern cleaning technologies, the waste water can be recirculated back into the process multiple times, thereby minimizing water consumption, saving energy and reducing costs. ASSA ABLOY has long established expertise in the surface treatment field, including processes such as passivation, anodization and plating.