Aluminum passivation creates a conversion chemical layer on the surface that serves to increase corrosion resistance and stabilize the electrical surface resistance.

We offer 2 types of passivation:

1. Chromium-free titanium-based aluminum passivation with Bonderit M-NT2040, which complies with BMW Process Specification 97022 for conversion layers on Al. It is mainly used to achieve surface resistance stabilization and to improve the long-term adhesion of adhesivly bonded joints.

2. SURTEC 650 passivation, classified as TCP, i.e. containing no hexavalent chromium. It is used as a corrosion protection for Al boards that need to be electrically conductive with use in the electrochemical industry, as pretreatment for spot welding of Al sheets, or alternatively as a base for aluminium wet or powder painting, where it provides increased adhesion and corrosion protection and meets the requirements of QUALICOAT and GSB .

Technical specification for SURTEC 650