A sequesteringagent USES chelation to separate the iron cation from the anion by chelating to prevent the formation of iron hydroxide during acidizing.
螯合剂利用螯合作用使铁离子(阳离子)与阴离子分离，以防止在酸化作业期间生成氢氧化铁。
2
An acid additive used in acidizing that is either a a sequesteringagent used to complex iron ions orb a reducing agent such as erythorbic acid used to reduce the oxidized state of iron.