The toxic properties of chromates have caused an environmental demand on replacement of the chromium (VI) compound coating processes (chromating). One of the suggested methods is a silane coating applied as a combination of non-functional and organofunctional silanes. The silane coating can reduce underfilm corrosion and to improve the adhesion of the paint systems even compared to chromate layers. As a bis-silyl functional silane, SiSiB® PC6122 has six hydrolyzable groups and are believed to be more crosslinked than tri- and tetra-functional analogs. The enhanced crosslinking leads to better barrier properties in anti-corrosion applications.