Gerald L. Witucki, The Dow Chemical Company Midland, MI06.05.17
Introduction
Corrosion impacts nearly every facet of our lives, from buildings, bridges and utilities, to planes, trains and automobiles. Every metal bolt, screw, plate, pipe or beam we put into service is susceptible to corrosion. The cost is our time, money, health and safety.
Many factors are outside of the control or the anticipation of the coatings formulator, including:
• construction materials: sub-optimum metal alloys and surface morphology;
• environmental contact: moisture, chemicals, microbes, abrasive particles, etc.; and
• operating conditions: temperature, flow rate, turbulence and phase separation.
Coatings are a key approach to mitigating corrosion. In general, corrosion occurs when oxygen, water and conductive ions (such as salts and acids) set up an electrochemical cell on the metal surface. By slowing the penetration of these corrosion elements, the formulator can improve the durability of a paint film and the service life of the coated object. This article focuses on two coatings properties: permeability and adhesion, offering recomm
Corrosion impacts nearly every facet of our lives, from buildings, bridges and utilities, to planes, trains and automobiles. Every metal bolt, screw, plate, pipe or beam we put into service is susceptible to corrosion. The cost is our time, money, health and safety.
Many factors are outside of the control or the anticipation of the coatings formulator, including:
• construction materials: sub-optimum metal alloys and surface morphology;
• environmental contact: moisture, chemicals, microbes, abrasive particles, etc.; and
• operating conditions: temperature, flow rate, turbulence and phase separation.
Coatings are a key approach to mitigating corrosion. In general, corrosion occurs when oxygen, water and conductive ions (such as salts and acids) set up an electrochemical cell on the metal surface. By slowing the penetration of these corrosion elements, the formulator can improve the durability of a paint film and the service life of the coated object. This article focuses on two coatings properties: permeability and adhesion, offering recomm
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