Measurement of Carbon on Cold-Rolled Steel: A Comparative Study Using Surface Analytical and Coulometric Methodologies

deVries, J.E.; Haack, Larry P.; Coduti, Phillip L.

doi:10.1021/ie00035a013

Cited by 3 publications

(1 citation statement)

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“…Finally we note that all coatings equally spread on the slightly rough surface of the substrate (R a = 0.5 μm). This indicates that polar Fe 2 O 3 and FeOOH sites are dominating potentially present, organic carbonaceous species that may resist or are formed during the industrial alkaline degreasing process respectively 43 , 44 . Therefore it appears unlikely that the varying performance of the coatings reflects different substrate wetting, the latter conceivably being promoted by some amphiphilic compounds.…”

Section: Resultsmentioning

confidence: 99%

Inhibition of Steel Corrosion and Alkaline Zinc Oxide Dissolution by Dicarboxylate Bola-Amphiphiles: Self-Assembly Supersedes Host-Guest Conception

Schmelter¹,

Langry²,

Koenig³

et al. 2017

Sci Rep

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For many decorative applications like industrial and architectural paints, prevention of metal substrates from corrosion is a primary function of organic coatings. Triggered release of inhibitor species is generally accepted as a remedy for starting corrosion in case of coatings damage. A polyurethane based coating, doped with bola-amphiphiles of varying molecular weight but with a common head group motif that stems from ring-opened alkenyl succinic anhydride, enables passivation of the defect and mitigates cathodic delamination, if applied on cold rolled steel. An antagonistic effect results from the intercalation of the bola-amphiphiles into layered double hydroxide Zn2Al(OH)6 and subsequent incorporation of the hybrid phase into the organic matrix. In particular higher molecular weight bola-amphiphiles get immobilized through alkaline degradation of the layered framework in the basic milieu at the cathode. By means of sediments from colloidal states it is demonstrated that in-situ formed zinc oxide encapsulates the hybrid phase, evidenced by impeded dissolution of the ZnO based shell into caustic soda. While inhibition of steel corrosion results from a Donnan barrier layer, impeded zinc oxide dissolution is rooted in zinc catalyzed bola-amphiphile hydrolysis and layered deposition of the crystalline spacer diol hydrogenated bisphenol-A.

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Section: Resultsmentioning

confidence: 99%