F.J. Shan
,
C.S. Liu
,
S.H. Wang
,
G.C. Qi
金属学报(英文版)
The corrosion behavior of hot dip galvanized steel
pretreated with bis-[triethoxy-\linebreak\noindent silylpropyl]
tetrasulfide (BTESPT) modified with alumina particles was studied.
The corrosion resistance of the passiving films was evaluated by
Tafel polarization curve and electrochemical impedance spectroscopy.
The films formed on the galvanized steel substrate were
characterized by Fourier transform infrared spectroscopy and energy
dispersive X-ray spectrometry. The surface morphology of the treated
hot dip galvanized steel samples was observed by Field Emission
Scanning Electron Microscope. The results show that the
pretreatments on the basis of silane films modified with nanoalumina
particles have reduced both anodic and cathodic current densities,
and increased total impedance in the measured frequency,
consequently, improving corrosion protection for hot dip galvanized
steel during immersion in NaCl solutions compared to chromate films
and silane films.
关键词:
Bis-sulfursilane
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S.H. Wang
,
C.S. Liu
,
F.J.Shan
,
G.C. Qi
金属学报(英文版)
The amino-tri-(methylenephosphonic acid) layers were adsorbed on the surface of AA6061 aluminum alloy for improving the lacquer adhesion and corrosion inhibition as a substitute for chromate coatings. The surface structure and characteristic of the amino-tri-(methylenephosphonic acid) layers on AA6061 aluminum alloy were investigated by means of XPS and ATR-FTIR analysis. The analyzed results showed that the amino-tri-(methylenephosphonic acid) adsorption layers adsorb on the surface of aluminium alloy $via$ acid-base interaction in a bi-dentate conformation. After the amino-tri-(methylenephosphonic acid) layers were coated with epoxy resin, the layers showed good adhesive strength and favorable corrosion resistance in contrast to
chromate coatings.
关键词:
Amino-tri-(methylenephosphonic acid)Layer
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