Poly Ethylene Succinic Acid Scale And Corrosion Inhibition Performance And Mechanism Study

Polyepoxysuccinic acid is a green water treatment agent without phosphorus or nitrogen and its biology degradability is better. It is has double performance of scale and corrosion inhibition. Put PESA into industry circulating water as scale and corrosion inhibitores, wich it is better for saving water resources.In this paper, based on the traditional one-step process method, improve the performance of initiator, use compound of calcium hydroxide and sodium hydroxide as initiators, this method can avoid high concentration of calcium ions in the product and the influence of performance for corrosion inhibition. In this condition that malefic anhydride as a raw material, sodium tungstate as catalyst, hydrogen peroxide as oxidant, the compound of calcium hydroxide and sodium hydroxide as initiator, which can obtain polyepoxysuccinic salt, after wasing with acidified methyl alcohol and drying, make target product polyepoxysuccinic acid; with single factor and orthogonal experiment method, to inspect the influence of the synthesis condition for the performance of corrosion inhibition, finally, can obtain the better synthesis condition of polyepoxysuccinic acid, use the infrared spectrum to show the molecular structure of polyepoxysuccinic acid; With the viscosimety, determinate the relative molecular weight of the synthesis Polyepoxysuccinic acid is 682-1230.The performance of CaCO3 inhibition of PESA was inspected by static tests. The results show that the PESA has better scale inhibition performance and thermal stability, suitable in the high degree of hardness, high pH value and high temperature water system, the performance of agent has better durability. By determination the rate of electricity conductance of oversaturation solution, inspect the influence of PESA for CaCO3 sedimentation, the changing of calcium carbonate crystal at different concentrations were studied by IR and SEM, according to this, discuss scale inhibition mechanism of Polyepoxysuccinic acid.By the methods of revolving hangs the piece, study the corrosion property of polyepoxysuccinic acid for carbon steel, the results show that the corrosion inhibition of PESA for A3 carbon steel exist critical value effect, when the used level surpassed certain value, the performance of corrosion inhibition decreases; Research the influence of temperature for the inhibition mechanism of PESA, PESA is not suitable for corrosion inhibition of carbon steel with high temprature industry circulating water. Through analyze polarization curve and SEM of test piece around joins, discuss preliminarily anticorrosion mechanism of polyepoxysuccinic acid were also preliminarily discussed in this paper.