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51318-10539-Marine anticorrosion and antifouling assessment of multifunctionalized hybrid sol-gel coatings

Picture for Marine anticorrosion and antifouling assessment of multifunctionalized hybrid sol-gel coatings
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This study describes the functionalization of a hybrid sol-gel polymeric coating with MOLY or ZAPP corrosion inhibitors and viable endospores of Bacillus licheniformis isolate (B6).

 

Product Number: 51318-10539-SG
Author: Rami Suleiman* / Amjad Khalil / Mazen Khaled / Bassam El Ali
Publication Date: 2018
Industry: Coatings and Linings
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$20.00
$20.00

The corrosion and fouling of steel surfaces are major problems affecting the infrastructure of most industries, especially the oil and gas industries. The application of barrier coatings is one of the most widely used methods for mitigating these metal-loss causing problems. In particular, multifunctional hybrid sol-gel coatings are a very promising alternative to the currently used commercial toxic anticorrosion/antifouling coatings. This study describes the functionalization of a hybrid sol-gel polymeric coating with MOLY(1) or ZAPP(2) corrosion inhibitors and viable endospores of Bacillus licheniformis isolate (B6). The resulting functionalized coatings were applied to S36 grade mild steel substrate and their corrosion protection properties have been evaluated in the lab using electrochemical impedance spectroscopy (EIS) technique as well as scanning electron microscopy and visual observations. The field testing of the anticorrosion and antifouling properties of all coatings was also conducted by the in-situ exposure of the coated panels to seawater at a marine exposure site. Both lab and field testing results of all coated samples indicated that the biotic systems (containing bacterial spores) inhibited corrosion and fouling more than the abiotic (without bacterial spores) ones due to varying adhesion, barrier and antimicrobial properties of these coatings. It revealed also that abiotic and biotic coatings doped with Moly inhibitor have demonstrated excellent corrosion and fouling inhibition properties comparing to ZAPP coatings and the Corro(3) commercial coating.

Key words: Sol-gel, anticorrosive pigments, protective bacterium, mild steel, fouling.

The corrosion and fouling of steel surfaces are major problems affecting the infrastructure of most industries, especially the oil and gas industries. The application of barrier coatings is one of the most widely used methods for mitigating these metal-loss causing problems. In particular, multifunctional hybrid sol-gel coatings are a very promising alternative to the currently used commercial toxic anticorrosion/antifouling coatings. This study describes the functionalization of a hybrid sol-gel polymeric coating with MOLY(1) or ZAPP(2) corrosion inhibitors and viable endospores of Bacillus licheniformis isolate (B6). The resulting functionalized coatings were applied to S36 grade mild steel substrate and their corrosion protection properties have been evaluated in the lab using electrochemical impedance spectroscopy (EIS) technique as well as scanning electron microscopy and visual observations. The field testing of the anticorrosion and antifouling properties of all coatings was also conducted by the in-situ exposure of the coated panels to seawater at a marine exposure site. Both lab and field testing results of all coated samples indicated that the biotic systems (containing bacterial spores) inhibited corrosion and fouling more than the abiotic (without bacterial spores) ones due to varying adhesion, barrier and antimicrobial properties of these coatings. It revealed also that abiotic and biotic coatings doped with Moly inhibitor have demonstrated excellent corrosion and fouling inhibition properties comparing to ZAPP coatings and the Corro(3) commercial coating.

Key words: Sol-gel, anticorrosive pigments, protective bacterium, mild steel, fouling.

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51318-10543-Resistance of polyethylene grades with permeation barriers in biofuels

Product Number: 51318-10543-SG
Author: Margit Weltschev / Manuela Haufe / Anka Kohl / Rainer Rehfeldt
Publication Date: 2018
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Jerrycans made of a high density polyethylene (HDPE) were filled with E85 and biodiesel and then exposed to temperatures of 20 °C (68°F) and 40 °C(104°F) for 5 years to study the interaction between HDPE and permeation barriers.
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51318-10535-Corrosion of Fire Sprinkler Piping in Untreated Pond Water under Nitrogen

Product Number: 51318-10535-SG
Author: Paul Su / Blair Swinnerton
Publication Date: 2018
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This study used untreated pond water containing corrosive anions and MIC-causing bacteria as an accelerated testing environment to explore the feasibility of nitrogen as a deoxygenation gas to mitigate corrosion of sprinkler pipes.
Picture for 51318-10544-Cathodic Protection, Coatings that Shield Cathodic Protection, Stress Corrosion Cracking and Corrosion Assessment in Aging Coated Pipe Lines and Buried Utility Structures
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51318-10544-Cathodic Protection, Coatings that Shield Cathodic Protection, Stress Corrosion Cracking and Corrosion Assessment in Aging Coated Pipe Lines and Buried Utility Structures

Product Number: 51318-10544-SG
Author: Mehrooz Zamanzadeh / George T. Bayer / Anil Kumar Chikkam
Publication Date: 2018
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Here we would like to elaborate on corrosion risk associated with coatings that shield cathodic protection.
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