Knowledge

Technical Presentations

Post Treatment of Anodising Layers
Presentation at Aluminum Two Thousand Congress 2015
Post Treatment of Anodising Layers Low Temperature and High Performing Ni-free Alternatives
Technical Paper which was awarded during the Aluminium 2000 Congress as best paper

For post treating anodising layers on aluminium, typically two different technologies are applied, the hot water sealing at 96-100 °C and the cold sealing using reactive salts to plug the pores of the anodic coating. Both applications show major disadvantages. Whereas the hot water sealing is extremely energy consuming due to the mandatory hot process temperature, the low temperature sealing processes typically apply nickel compounds being harmful to the environment. Nickel salts are toxic and carcinogenetic, having irreversible effects on the human body and health. Furthermore, nickel containing waste waters are difficult to treat, especially when also aluminium is present. New nickel-free technologies have been developed accordingly, enabling a low temperature application yielding in major energy savings. The deposition of antisoluble compounds in the pores of the anodizing layer leads to best stability and corrosion protection, exceeding the performance of hot water sealing. The new process solutions as being non-toxic are less risky to store and to handle, assisting the safety at work. Implementing a new photometrical method for analysing the ingredients, process stability and production quality can be improved. In some cases, the pH-resistance of the anodised surface can be enhanced, extending the application field of anodised aluminium. Moreover, the waste water treatment of the rinses is carried out at pH 9-10, hence, can be done mutually with aluminium containing effluents.

Structure Analysis and Layer Formation Processes of Trivalent Chromium Containing Passivations
Presentation from IntAIRCOAT 2015
Pre-Treatments of Metals before Painting
Presentation at the Forum parts2clean 2014
Optimization of Cleaning Processes based on Process Chain Analysis
Presentation at the Expert Forum part2clean 2014
Quality assurance in Industrial Parts Cleaning - Basics Chemistry and Processes
Presentation at the Expert Forum part2clean 2013
Neutral cleaner - always neutral? Application areas of neutral cleaners at the industrial parts cleaning
Presentation at the Expert Forum part2clean 2013
Replacement of Hexavalent Chromium
Presentation at TSB Project Meeting in Lboro
SurTec 540, Co-free quench additive
Presentation at the Hot Dip Galvanizing conference in Špindleruv Mlyn, Czech Republic
What is temporary corrosion protection - Systems for temporary corrosion protection
Presentation at the Experts Forum at parts2clean 2012, Stuttgart, Germany
Sustainable Surface Treatment Processes for the Aircraft Industry
Presentation at SurfAir 2012, Biarritz, France
TCP – Replacement of conventional chemical treatment before painting
Presentation at Eurosurfas, Barcelona, Spain
SurTec 609 – Value Added Phosphate Alternative
Presentation at 1st Surface Treatment Symposium, Istanbul, Turkey
SurTec 650 – Tri-Chrome Passivation of Aluminium
Presentation at 5th Aluminium Symposium, Istanbul, Turkey