Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Engineering
Microstructural Development Of Galvanized Steels Prepared With Ni-P Electroless Deposited Pre-Coatings, Chulaluk Somphotch, Suparoek Henpraserttae, Ekasit Nisarattanaporn, Yuttanant Boonyongmaneerat
Microstructural Development Of Galvanized Steels Prepared With Ni-P Electroless Deposited Pre-Coatings, Chulaluk Somphotch, Suparoek Henpraserttae, Ekasit Nisarattanaporn, Yuttanant Boonyongmaneerat
Journal of Metals, Materials and Minerals
An electroless pre-coating process is investigated as a possible method to prevent the sandelin effect, whereby steels containing silicon reacts rapidly with zinc during galvanization. From the microstructural and kinetics analysis, it is found that nickel-phosphorus electroless pre-coatings effectively serve as barriers to the reaction between Fe and Zn during galvanization, regardless of the silicon content in the steel substrates. Correspondingly, the coating thickness of the galvanized steels can be well-controlled.
Effect Of Surfactant On Conductivity Of Poly(Pyrrole-Co-Formyl Pyrrole) Via Emulsion Polymerization, Sirilak Arunsawad, Kawee Srikulkit, Sarintorn Limpanart
Effect Of Surfactant On Conductivity Of Poly(Pyrrole-Co-Formyl Pyrrole) Via Emulsion Polymerization, Sirilak Arunsawad, Kawee Srikulkit, Sarintorn Limpanart
Journal of Metals, Materials and Minerals
P(Py-co-FPy) were synthesized via emulsion polymerization, SDS and PSS used as surfactant and TFA as catalyst. Amounts of surfactant were vary as mole ratio of surfactant : monomer (0.25, 0.5 and 1.0). The synthesis copolymers were characterized by FTIR, SEM, particle size analyzer and four point probes. As a result of FT-IR spectra proved that the synthesized copolymers are associated with the structure of the P(Py-co-FPy). Spherical particles were detected by SEM and particles diameter is in range of 60-600 nm depending on type and amounts of surfactant. The electrical conductivity is in the range of 1.74x 10-5 to 2.21 …