Synthesis of A Mannich Base Type Corrosion Inhibitor

A Mannich base type corrosion inhibitor JKY with high acidification efficiency was synthesized from acetophenone,formaldehyde and ethylenediamine.The complexed corrosion inhibitors was obtained by JKY complexd with OP-10 and formaldehyde.The efficiencies of corrosion inhibitors were compared.The results showed at 60 ℃ and atmospheric pressure,0.3% corrosion inhibitor JKY in mud acid(12%HCl+3%HF) had a corrosion rate of 1.431 g·m-2·h-1 and corrosion inhibition rate of 98.3% for N80 steel.Complexed with OP-10 and formaldehyde,the Mannich base type corrosion inhibitor had better solubility in water and anti-corrosion performance in HCl and HF.The complexed corrosion inhibitor had a corrossion rate of 0.294 g·m-2·h-1 and corrosion inhibition rate of 99.65% for N80 steel at a dosage of 1.0% with the optimum ratio of JKY∶OP-10∶formaldehyde=0.7%∶0.1%∶0.2%.