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COATINGSPRO NOVEMBER 2017 47 Science Behind It T raditional coatings have approached corrosion w ith a perspective of protecting metal from the environment w ith a coating, such as an epox y, to block exposure to corrosive elements. T hey form a ty pe of barrier to external elements. However, appli- cation outside the lab is difficult considering factors such as weather, mi x ratios, confined spaces, and the necessity for ag gressive preparation of the metal. By using M A XON Technologies' CR S product on the Queen Mar y, F. Roberts Construction, Inc. was able to reduce surface preparation and utilize a simple application process while penetrating the metal to address corrosion where and how it occurs. Not on But in the Metal CRS is not a rust converter, meaning it doesn't stop at the rust layer. Instead, it is a penetrating anti-corrosive coating with oxygen-scavenging properties. For corrosion to occur, three elements are needed: the metal, an electrolyte, and ox ygen must converge. M A XON's CR S has been engineered w ith natural ingredients containing ox ygen-scavenging properties that find ox ygen molecules w ithin the metal and extract them up to the M A XON bound- ar y layer that sits on the surface of the substrate. T his process is repeated continuously w ith no need for reapplication. By removing the ox ygen, the chemical equation is broken, and corrosion cannot occur. R ather than fight sy mptoms on the surface, CR S penetrates the metal to focus on the chemistr y of corrosion inside the metal. It penetrates below the corroded layer up to 230 microns (9.1 mils) in four days (SEM/EDS testing Cal Poly), and it can pass through top layers of rust and paint. A bond is created the first day of application. On day two, the CR S begins penetrating the lattice of the metal, and by day four, it has penetrated deep into the metal. is is a completely new approach to protecting metal. CRS allows us to stop corro- sion where it starts rather than where it ends. Achieving an Ionic Bond CRS was chemically designed to be attracted to metal and to form a strong, ionic bond that allows CRS to remain within the zone of corrosion, creating a continuous, long-term solution of 10 years or more. In an ionic bond, atoms are bound by attraction of oppositely charged ions. With regard to the CRS, the bond occurs by its attraction and penetra- tion of the metal where it binds itself into the lattice. At the surface, CRS encapsulates rust and neutralizes impurities on its way through to bonding with the lattice of metal below. en, a topcoat of paint, epoxy, or concrete may be applied to the MA XON substrate where it can achieve a robust attach- ment as well because it is joined with the internally bonded CRS rather than a passive surface preparation. A Complete System By capitalizing on the reduced prep, simple application, ionic bond, and penetrating into the metal (rather than forming a barrier on top), the CRS is becoming part of the matrix of the metal, providing long-lasting protection from corrosion for the Queen Mar y. CP Penetrating Into the Metal By Lee Greer, Technical Officer at MA XON Technologies