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 st...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.展开更多
The composition of N,N,N′,N′ ethylenediaminetetrakis (methylenephosphonic acid) (EDTMP) chelates with Cu(Ⅱ), Fe(Ⅲ) and Pb(Ⅱ) was determined by reversed phase ion pair chromatography. The molar ratio of metal i...The composition of N,N,N′,N′ ethylenediaminetetrakis (methylenephosphonic acid) (EDTMP) chelates with Cu(Ⅱ), Fe(Ⅲ) and Pb(Ⅱ) was determined by reversed phase ion pair chromatography. The molar ratio of metal ion to ligand is 1∶1 respectively in the three chelates.展开更多
A mixture containing eleven lanthanide ions was separated and detected on an anion exchange co lumn by ion chromatography with indirect photometry detection (IPC).An aqueous solution of 1.5×10 -2 mol/L ni...A mixture containing eleven lanthanide ions was separated and detected on an anion exchange co lumn by ion chromatography with indirect photometry detection (IPC).An aqueous solution of 1.5×10 -2 mol/L nitrilotri(methylenephosphonic) acid and 2.5×10 -3 mol/L tiron was used as the eluent in which the former served as complexing agent and eluent,the latter played as color reagent and eluent.The effects of acidity,concentration and composition of eluent on the retention behavior of the analytes and detection sensitivity are discussed.展开更多
基金the Science and Technology Plan Project of LiaoningProvince, China (No.2006221011)
文摘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.
文摘The composition of N,N,N′,N′ ethylenediaminetetrakis (methylenephosphonic acid) (EDTMP) chelates with Cu(Ⅱ), Fe(Ⅲ) and Pb(Ⅱ) was determined by reversed phase ion pair chromatography. The molar ratio of metal ion to ligand is 1∶1 respectively in the three chelates.
文摘A mixture containing eleven lanthanide ions was separated and detected on an anion exchange co lumn by ion chromatography with indirect photometry detection (IPC).An aqueous solution of 1.5×10 -2 mol/L nitrilotri(methylenephosphonic) acid and 2.5×10 -3 mol/L tiron was used as the eluent in which the former served as complexing agent and eluent,the latter played as color reagent and eluent.The effects of acidity,concentration and composition of eluent on the retention behavior of the analytes and detection sensitivity are discussed.
