Powder and High-Solid Coatings as Anticorrosive Solutions for Marine and Offshore Applications? A Review

Abstract

The constant change in coating technology and environmental regulations has led to the development of low-solvent to solvent-free organic coatings, such as powder and high-solid coatings. These two technologies are well developed, but are still not the preferred choice when considering anticorrosive coating for marine and offshore applications. This mostly arise from a lack of perspective in their long-term behavior and from the difficulty in their applications. This review’s principal aim is to describe powder and high-solid technologies from their formulation and application to their use in marine and offshore applications while recalling and giving key notions needed when the field of anticorrosive coatings is considered. First, the requirement for coatings to be called anticorrosive will be given alongside with their protection and failure mechanisms. The formulation and application for high-solid and powder coatings will be exposed followed by the description of the type of coating chemistry used in harsh environment. Finally, high-solid and powder coatings behavior in these types of environment will be discussed.

Comparative study between natural and artificial weathering of acrylic‐coated steel, aluminum, and galvanized steel

“…[ 31,32 ] Different mechanical internal stresses derived from temperature cycles experienced could lead to a slightly different magnitude of coating alteration appreciable by 60° glossmeter employment. [ 33–35 ]…”

“…[31,32] Different mechanical internal stresses derived from temperature cycles experienced could lead to a slightly different magnitude of coating alteration appreciable by 60°glossmeter employment. [33][34][35] In comparison, also the total gloss loss measured after the UVB accelerated test is reported in the graph as dashed horizontal lines. Note that the gloss loss after 300 h under UVB is lower compared with the effect of 1 year of natural exposure.…”

pH-Responsive, Thermoset Polymer Coatings for Active Protection against Aluminum Corrosion

“…In this process, charged powder coating particles (consisting of polymers, cross-linkers, and additives) are attracted to the electrically earthed substrate, producing a thin uniform coating across the entirety of the metal surface. − High-optical clarity powder coatings for high aesthetic demand applications, such as the protection of aluminum alloy wheels, are typically based on epoxide functional acrylic copolymers, cross-linked with flexible C8–C12 diacids such as sebacic or dodecanoic acid. Such coatings deliver a combination of excellent mechanical properties, chemical resistance, and optical clarity. ,− Polymer coatings act as a physical barrier protecting the metal surface from corrosion; however, this passive protection is only effective as long as the coating remains intact and the entire wheel (including edges) is coated with a protective layer of polymer. − …”

Accelerated Corrosion Tests in Quality Labels for Powder Coatings on Galvanized Steel—Comparison of Requirements and Experimental Evaluation

“…Thermoset coatings are a broad group of materials, including different types of resins and hardeners [ 5 ]. Currently, the trends in the powder coatings market include improving their durability, lowering the curing temperature, and environmental aspects of paint manufacturing [ 6 ].…”