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Theoretical study of the HS (v',,j' = 1) + O2;(v''=0,j''=1) reaction
Ballester, M. Y.; Guerrero, Y. O.; Garrido, J. D.We report a theoretical study of the title four-atom reaction for a wide range of translational energies, considering the reactants in the ground vibrational state and also in some vibrationally excited levels of the HS radical. All calculations have employed the quasi-classical trajectory (QCT) method and a reported double many-body expansion potential energy surface for ground electronic state of HSO2. Cross ...
Dynamics and kinetics of the S + HO2 reaction: A theoretical study
Ballester, M. Y.; Varandas, A. J. C.We report a quasi-classical trajectory study of the S + HO2 reaction using a previously reported global potential energy surface for the ground electronic state of HSO2. Zero-point energy leakage is approximately accounted for by using the vibrational energy quantum mechanical threshold method. Calculations are carried out both for specific ro-vibrational states of the reactants and thermalized ones, with rate ...
Comparative behaviour in terms of wear and corrosion resistance of galvanized a...
Souza, M. E. P.; Ariza, E.; Ballester, M.; Rocha, L. A.; Freire, C. M. A.Materials degradation due to simultaneous chemical and mechanical effects may occur under a variety of conditions. Galvanized and zinc-iron electrodeposited steels are widely used to protect automobile bodies against corrosion. In such applications, it is important to investigate the electrochemical and tribological behaviour of the coatings, in order to understand the behaviour of those surfaces in a tribologi...
Resistência à corrosão de aço galvanizado e de aço eletrodepositado com ZnFe re...
Souza, M. E. P.; Ariza, E.; Ballester, M.; Yoshida, I. V. P.; Rocha, L. A.; Freire, C. M. A.As características protectoras das superfícies de aços galvanizados são geralmente intensificadas através da passivação por crómio hexavalente (Cr+6). Porém, por ser este um elemento tóxico, vários estudos visando a substituição do procedimento de cromatização vêm sendo realizados. As resinas de silicone, devido a propriedades como dureza, resistência química e aderência, podem vir a ser um excelente substituin...
Organic-inorganic hybrid coatings for corrosion protection of galvanized steel ...
Souza, M. E. P.; Ariza, E.; Ballester, M.; Yoshida, I. V. P.; Rocha, L. A.; Freire, C. M. A.The development of hybrids materials by the sol-gel process has been extensively investigated in recent years. The combination a wide variety of compositions and production processes had permit the use of these materials in different applications like coatings for corrosion protection of metals and abrasion resistant coatings. In this work organic-inorganic hybrid materials have been prepared from the hydrolysi...
The effect of the presence of silicone films on the corrosion resistance of Zn ...
Souza, M. E. P.; Ariza, E.; Ballester, M.; Yoshida, I. V. P.; Rocha, L. A.; Freire, C. M. A.Chromatation pre-treatments have been widely used to improve galvanized steel corrosion resistance. However, due to the high toxicity of chromate ions, chromatation pre-treatments tend to be banned and, in last years, alternative coating systems are under investigation. Recently, polysiloxanes have been developed for application as coatings. Among them, and due to their specific properties, such as hardness, ch...
Resistência à corrosão de aço galvanizado e de aço eletrodepositado com znfe re...
Souza, M. E. P.; Ariza, E.; Ballester, M.; Yoshida, I. V. P.; Rocha, L. A.; Freire, C. M. A.As características protectoras das superfícies de aços galvanizados são geralmente intensificadas através da passivação por crómio hexavalente (Cr+6). Porém, por ser este um elemento tóxico, vários estudos visando a substituição do procedimento de cromatização vêm sendo realizados. As resinas de silicone, devido a propriedades como dureza, resistência química e aderência, podem vir a ser um excelente substituin...
Organic-inorganic hybrid coatings for corrosion protection of galvanized steel ...
Souza, M. E. P.; Ariza, E.; Ballester, M.; Yoshida, I. V. P.; Rocha, L. A.; Freire, C. M. A.The development of hybrids materials by the sol-gel process has been extensively investigated in recent years. The combination a wide variety of compositions and production processes had permit the use of these aterials in different applications like coatings for corrosion protection of metals and abrasion resistant coatings. In this work organic-inorganic hybrid materials have been prepared from the hydrolysi...
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