In order to effectively reduce the corrosion rate of natural gas transmission pipelines and improve their operational efficiency,a new corrosion inhibitor XHT-1 for natural gas gathering and transportation pipelines was prepared using vegetable oleic acid,polyethylene polyamines,and urea as raw materials through a two-step method.The synthesis process of intermediate product X and final product XHT-1 was optimized using synthetic product yield as the evaluation index,and the corrosion protection effect of the new corrosion inhibitor XHT-1 was evaluated using corrosion inhibition rate as the evaluation index.The results showed that the yield of intermediate product X was the highest(90.6％)when the monomer molar ratio of vegetable oleic acid and polyethylene polyamines was 1∶1.2,the reaction temperature was 130℃,and the reaction time was 3 hours;When the molar ratio of intermediate product X to urea monomer was 1:0.8,the reaction temperature was 140℃,and the reaction time was 4 hours,the yield of the new corrosion inhibitor XHT-1 was the highest(98.2％).The higher the concentration of the new corrosion inhibitor XHT-1,the higher the corrosion inhibition rate.When the concentration of XHT-1 was 300mg·L-1,the corrosion inhibition rate could reach 95.8％,indicating a good corrosion inhibition effect.The research results suggest that the new corrosion inhibitor XHT-1 can be used for corrosion protection of target natural gas transmission pipelines.
natural gas gathering and transportationpipeline corrosioncorrosion inhibitorssynthesis condi-tionsperformance evaluation
NETL
NSTL
万方数据
