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Thursday, February 20 • 4:30pm - 5:00pm
Room Temperature Cured Corrosion Protection of Metals with Novel 2K Waterborne Organofunctional Silane Pretreatments - Evonik

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As global environmental regulations continue to tighten restrictions on the use of well-established metal surface pretreatment processes such as chromate treatment and phosphatization, the need for environmentally-friendly corrosion protection systems has never been greater.  While one promising alternative to this worldwide regulatory issue is waterborne, heavy metal-free silane pretreatments, this technology often requires significantly high curing temperatures (ranging from 80 – 200 °C) to achieve sufficient corrosion protection of metals.  Although many industries around the world are moving away from hazardous metal surface pretreatment processes due to global regulations and consumer awareness, a majority of these industries do not have the capabilities or cost positions to replace this existing technology with environmentally-friendly alternatives that require elevated temperature curing procedures.  In this work, we demonstrate for the first time that a 2K system comprising of a hydrophobic diamino-functional silane oligomer and a waterborne sol-gel silane provides excellent corrosion resistance, alkaline resistance, and weatherability to metal surfaces (primarily aluminium alloys and steels) when cured at room temperature.  By incorporating this hydrophobic diamino-functional silane oligomer into the waterborne sol-gel silane, the hydrophobicity, surface passivation, and crosslinking density of the system is vastly enhanced - even in the absence of an elevated temperature cure.  These new findings demonstrate significant progress in overcoming the most prevalent obstacle in the use of waterborne silane technology as an environmentally-friendly alternative for corrosion protection of metal surfaces.  Industries and markets that previously could not use environmentally-friendly metal pretreatment technology due to the elevated temperature curing requirements can now explore this field with a higher probability of successfully replacing existing hazardous metal pretreatment technology.

Speakers
avatar for Jacob Shevrin

Jacob Shevrin

Applied Technology Scientist, Evonik Corporation
BiographyJacob Shevrin joined Evonik’s Functional Silanes business line as an Applied Technology Scientist in May of 2017. Since then, his research has focused on silanes for coatings and environmentally-friendly metal treatment applications. Prior to joining Evonik, Jacob obtained... Read More →



Thursday February 20, 2020 4:30pm - 5:00pm
Rhythms Room I