Blistering failure of elastic coatings with applications to corrosion resistance

Abstract

A variety of polymeric surfaces, such as anti-corrosion coatings and polymer-modified asphalts, are prone to blistering when exposed to moisture and air. As water and oxygen diffuse through the material,...

Film Instability Induced by Swelling and Drying

“…Several surface instabilities, such as surface wrinkling, − dewetting, , and blistering, − have been reported for thin films supported on a solid substrate. Surface wrinkling results in periodic wrinkles, whereas dewetting relieves mesostructures such as holes, droplets, or polygonal networks.…”

“…Next, we discuss if osmotic pressure (π op ) could lead water and solutes to flow into the inner region of a P2VP film. Previous papers have demonstrated that osmotic pressure is a crucial driving force for water flow from low π op to high π op . ,, For example, osmotic blisters can occur for metallic materials with polymer coating when chemical reactions (such as corrosion) occur at the metal–polymer interface. , The chemical reactions form water-soluble components. The water-soluble components act like solutes, producing a higher π op for corrosive metals with polymer coating than for pure water.…”

“…There are several discrepancies. First, the formation of craters on the P2VP film covering SiO x /Si just takes a few minutes (Figure ), whereas the formation of blisters on the coat covering corrosive substrates takes days or months. , The latter case is because the formation rate of surface blistering correlates with the corrosion rate of the substrate interface. Second, there are no chemical reactions on the P2VP and SiO x /Si interface.…”

Progress in bioactive surface coatings on biodegradable Mg alloys: A critical review towards clinical translation

“…Once corrosion phenomena are initiated, the abundant release of H 2 causes blisters formation. The accumulation of H 2 under polymeric layer makes them grow and ultimately burst with prolonged immersion [ 150 ]. Additionally, polymeric layers are prone to swelling and subsequent delamination in the presence of physiological media [ 151 ].…”

Recent progress on crack pattern formation in thin films

“…The circular blister can originate from film imperfection or is triggered by indentation or nanoindentation. [147][148][149] When the circular blister grows, its edge will become unstable and form a petal-like pattern, as shown in Fig. 14(a).…”