TY - JOUR
T1 - Organic modified silica obtained from DBTL polycondensation catalyst for anticorrosive coating
AU - Salazar-Hernández, Carmen
AU - Salazar-Hernández, Mercedes
AU - Mendoza-Miranda, Juan Manuel
AU - Miranda-Avilés, Raúl
AU - Elorza-Rodríguez, Enrique
AU - Carrera-Rodríguez, Raúl
AU - Puy-Alquiza, María J.
N1 - Publisher Copyright:
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - DBTL as neutral polycondensation catalyst was employed to obtain organic modified silanes (ORMOSILs), which were studied as anticorrosive films for aluminum at saline corrosion. The ORMOSILs were synthesized using TEOS as silica precursor, different alkylalkoxysilanes (trimethoxy(methyl)silane, triethoxy(octyl)silane, 3-aminopropyl(triethoxy)silane and DBTL-catalyst were employed under the free solvent sol–gel process. Results of chemical characterization of ORMOSILs coatings show that under SEM technique coatings have homogenous films, and there are a crosslinking between silica and organic modified under the Infrared spectroscopy and 29Si CPMAS-NMR techniques. On the other hand, Brinell hardness and Pull-Off adhesion tests show that all ORMOSILs increase the aluminum surface hardness between 1 and 10%, and the ORMOSILs critical forces for adhesion are in the range of 106–132 N; therefore, the ORMOSILs coatings have an excellent adhesion to aluminum surface, furthermore, the saline corrosion test shows that organic modified silica avoid the pitting aluminum corrosion; corrosion rate decreases about 60–85%; the anticorrosive behavior according to modified-silica was determined as: SiO2–NH2 > SiO2–Me ∼ SiO2–Octyl. [Figure not available: see fulltext.].
AB - DBTL as neutral polycondensation catalyst was employed to obtain organic modified silanes (ORMOSILs), which were studied as anticorrosive films for aluminum at saline corrosion. The ORMOSILs were synthesized using TEOS as silica precursor, different alkylalkoxysilanes (trimethoxy(methyl)silane, triethoxy(octyl)silane, 3-aminopropyl(triethoxy)silane and DBTL-catalyst were employed under the free solvent sol–gel process. Results of chemical characterization of ORMOSILs coatings show that under SEM technique coatings have homogenous films, and there are a crosslinking between silica and organic modified under the Infrared spectroscopy and 29Si CPMAS-NMR techniques. On the other hand, Brinell hardness and Pull-Off adhesion tests show that all ORMOSILs increase the aluminum surface hardness between 1 and 10%, and the ORMOSILs critical forces for adhesion are in the range of 106–132 N; therefore, the ORMOSILs coatings have an excellent adhesion to aluminum surface, furthermore, the saline corrosion test shows that organic modified silica avoid the pitting aluminum corrosion; corrosion rate decreases about 60–85%; the anticorrosive behavior according to modified-silica was determined as: SiO2–NH2 > SiO2–Me ∼ SiO2–Octyl. [Figure not available: see fulltext.].
KW - Anticorrosive coating
KW - DBTL
KW - ORMOSIL
KW - Saline corrosion
KW - TEOS
UR - http://www.scopus.com/inward/record.url?scp=85049176127&partnerID=8YFLogxK
U2 - 10.1007/s10971-018-4732-9
DO - 10.1007/s10971-018-4732-9
M3 - Artículo
SN - 0928-0707
VL - 87
SP - 299
EP - 309
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
IS - 2
ER -