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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S.H. Wang
金属学报(英文版)
The conversion coating was formed by dipping
AA6061 in a fluorotitanate/zirconate acid and amino trimethylene
phosphonic acid (ATMP) solution at room temperature. The formation
process and the anti-corrosion performance of the conversion coating
were investigated using electrochemical test and salt spray test
(SST), respectively. The electrochemical test shows that the Zr/Ti
and ATMP coating improves the corrosion resistance of AA6061 as good
as the chromate (VI) coating. But the results of SST show that the
corrosion resistance of Zr/Ti and ATMP coating is not as good as the
chromate (VI) coating. The corrosion area is less than 2% after
72h.
关键词:
Corrosion resistance
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