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Self-Cleaning, Corrosion and Wear Resistant Industrial Components for Water Industry . Prof. Pradeep K. Rohatgi Prof. Michael Nosonovsky. Project Goals & Scope (2013-2014). Developing low cost, durable hydrophobic surfaces
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Self-Cleaning, Corrosion and Wear Resistant Industrial Components for Water Industry Prof. Pradeep K. Rohatgi Prof. Michael Nosonovsky
Project Goals & Scope (2013-2014) • Developing low cost, durable hydrophobic surfaces • Reduce fouling of components used by IAB member companies (Stainless steel, Hastelloy) by developing low cost, durable hydrophobic surfaces • Reduce ice formation and ice fouling of the components of the interest of IAB member companies (316 SS and 304 SS) by developing icephobic surfaces • Establish relationships between surface roughness, contact angle, corrosion on a quantitative basis
Approach Coating Approaches Mechanically and chemically abrade materials to introduce various surface roughness on metal surface Oxidizematerials varying oxygen partial pressure, temperature and time to create surface micro- and nano-structures that aid in improving contact angle and corrosion resistance Sol-gel formulations: Sols from trimethoxyethylsilane (MTES) containing corrosion inhibitors, rust inhibitors and binders will be coated on cast/ductile iron, brass, steels and hastelloy
Rust resistance surface coating to increase both contact angle as well as corrosion resistance.
Uncoated: i corr: 12.2397 µA/Cm2 corr rate: 174.4 µm/Y CA: 66.67° Coated: icorr: 2.8651 µA/Cm2 corr rate: 34.51 µm/Y CA: 99.16° Copper
Uncoated • icorr: 2.1142 µA/cm2corr rate: 17.16 µm/Y • CA: 54.19 • Coated • icorr: 0.1168 µA/cm2 • corr rate: 1.407 µm/Y • CA: 97.30° 316 SS
C O Na Mg Al Si P S Cl K Fe Ca Cr Ni Results To-date Decrease fouling of 316SS and Hastelloy surface The results are preliminary and indicate that the surface is fouled with salts of Mg, Na, and K spread evenly on the surface and chunks of compounds primarily containing Al, K, Si, and O. un-fouled sample Composition SEM image fouled sample Surface Coating: Sol-gel C.A. w/a= 69° C.A. w/a= 95° Composition SEM image
stainless steel Hastelloy