A bio-based rust inhibitor is prepared by using biomass material furfural derivatives as the matrix substance in addition to compounding of sodium gluconate and sodium benzoate,.The rust resistance of the bio-based rust inhibitor is investigated via a series of tests including static weight loss,contact angle,scanning electron microscopy,rust resistance testing,coating adhesion and salt spray resistance,etc.And its compatibility with EP-01 epoxy zinc rich primer and MC-WEP-3 waterborne epoxy zinc rich primer is also studied.The results indicate that the corrosion inhibition performance of HMF is basically lost at 90 ℃.the corrosion inhibition rate of 300 ppm HMF on Q235 at 30 ℃ in a lmol/L HCl solution can reach up to 69.4％.The addition of 2％rust inhibitor in water rust-removing process enables no obvious rust on the surface of the sample within 24 hours,and has no impact on the adhesion and salt spray resistance of subsequent solvent-based or waterborne epoxy zinc rich primers.
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