在聚琥珀酰亚胺的基础上分别合成了含单羟基、双羟基、羧基、磺酸基四种基团的聚天冬氨酸（PASP）衍生物,采用静态失重法和电化学腐蚀法对其缓蚀性能进行了研究。试验结果表明,这几种聚天冬氨酸衍生物都是以抑制阳极为主的缓蚀剂,其中接枝双羟基的衍生物（DHPAP）的缓蚀效果最好,当加药量为100mg.L-1时缓蚀率达到92.8%,比聚天冬氨酸提高了50%以上。PASP、PASP-ASP（含羧基）在20天内的生物降解率在60%以上,具有优良的生物降解性,而PASP-SEA（含磺酸基）、HPAP（含单羟基）、DHPAP（含双羟基）属于可生物降解物质。
On the basis of polysuccinimide,four kinds of polyaspartic acid（PASP） derivatives respectively containing functional groups of single and double hydroxyl,carboxyl,sulfonic were synthesized.The methods of static weight-loss and electrochemical corrosion were employed to study the corrosion performance.The results show that those polyaspartic acid derivatives are anodic inhibitors,and grafted di-hydroxyl derivative has the best effect of corrosion inhibition,and the ratio of corrosion inhibition reached 92.8 % when the dosage was 100 mg·L-1,increased 50% more than polyaspartic acid.The order of inhibition efficiency to A3 steel of these five kinds of polyaspartic acid and its derivatives is PASP〈PASP-SEA〈PASP-ASP〈HPAP〈DHPAP.The biodegradation rates can reach up to 60% in 20 days.PASP-SEA,HPAP and DHPAP belong to biodegradable substance.
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