A New Polyethylene Corrosion Protecting Coating With Ion Selectivity

作者：Dong Yuhua^*; Ren Ke; Zhou Qiong

来源：International Conference on Advanced Design and Manufacturing Engineering (ADME 2011), 2011-09-16 to 2011-09-18.

DOI：10.4028/www.scientific.net/AMR.314-316.273

• polyethylene
• MAH
• grafting
• ion selectivity
• coating

Linear low density polyethylene (LLDPE) was chemically modified with grafting maleic anhydride (MAH) monomer on its backbone by inciting blending. Nano-particles SiO2 was modified by cationic surfactant hexadecyl trimethyl ammonium bromide (CTAB) and anionic surfactant sulfosalicylic acid (SSA) and added to PE coating respectively. Measurement of membrane potential showed that the coating containing modified SiO2 nano-particles had characteristic of ion selectivity. The properties of the different coatings were investigated according to relative industrial standards. Experimental results indicated that PE coating with ion selectivity had better performances, such as adhesion strength, cathodic disbonding and anti-corrosion, than those of coating without ion selectivity. Crystal structure of the coatings before and after alkali corrosion was characterized by Fourier transform infrared spectra (FTIR) and X-ray diffraction (XRD). Structure of the coating without ion selectivity was damaged by NaOH alkali solution, causing mechanical properties being decreased. And the structure of the ion selective coatings was not affected.

• 出版日期2011
• 单位中国石油大学（北京）