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Again the substrate geometry and the catalytic coating were varied. The results from engine as well as vehicle tests show advantages in a highly systematic context by changing either geometrical or chemical factors. ...Introduction of a DOC technology with partial exchange of Pt by Pd in the catalytic coating gives additional advantages with respect to stability of the system and cost reduction.

Steel sheet products with eight combinations of metallic and organic coatings were tested, utilizing a simple crevice coupon design. On-vehicle exposures were conducted in St.