A sequestering agent 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。
When the dyeing liquid containing sodium sulfate, alum, lime and iron salts, etc., must be added chelating agent.
当印染液中含有硫酸钠、明矾、石灰和铁盐等，必须加入螯合剂。
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