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Table 2 Chemical functionalization process parameters using 3-GPTMS e 3-APTES on steel API 5L X42 substrate

From: Fusion-bonded epoxy composite coatings on chemically functionalized API steel surfaces for potential deep-water petroleum exploration

Organosilanes 3-GPTMS 3-APTES
Chemical Formula [OCH2CHCH2O(CH2)3]Si(OCH3)3 [NH2(CH2)3]Si(OCH2CH3)3
Chemical structure
Organofunctional group
Organosilane Solution 2/(80/20) v/(v/v)
3-GPTMS/(deionized water/methanol solution)
2/(90/10) v/(v/v)
3-APTES/(deionized water/ethanol solution)
Hydrolysis Time (h) 48 0.5
pH 5–5.5 (acetic acid) pH natural
Molar ratio water/alkoxide 480.5 452.5
Immersion time (s) 20 30
Cure temperature (°C) 150 ± 5 70 ± 5
Cure Time (h) 1 1.5
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