Control of bacterial pollution through a physical biocide in a process tunnel of surface treatment for bodies

Abstract

 In the painting process of automobile bodies, the first stage 
of anticorrosion is obtained generating a chemical layer of 
protection of the plate surface. 
The first used technologies obtained a layer of protection 
on the basis of metallic phosphates. The best technologies 
available nowadays, generate a nanometric layer of conversion 
on the basis of hydroxides of zirconium, by means of a 
nanotechnology process. When it was realised this change of 
technology, in center of production of automobiles of Vigo of 
PSA Group: An increase of microbiological contamination of the 
TTS process has been stated, when being reduced the toxicity of
the chemical agents that compose the treatment. 
This work described the results obtained in the diminution of 
microbiological contamination of the bath of Rinsing 3 that 
respects the reference values of the PSA Group, after the 
installation of a physical biocide in the recirculation of the 
pretreatment bath