山东冶金
山東冶金
산동야금
SHANDONG METALLURY
2013年
5期
42-43,46
,共3页
傅士刚%马清文%王俊秀%王艳芹%李龙霞
傅士剛%馬清文%王俊秀%王豔芹%李龍霞
부사강%마청문%왕준수%왕염근%리룡하
碳铁合金%TFe%灼烧除碳%重铬酸钾滴定法
碳鐵閤金%TFe%灼燒除碳%重鉻痠鉀滴定法
탄철합금%TFe%작소제탄%중락산갑적정법
carbon iron alloy%TFe%burning carbon removal%potassium dichromate titration method
实验选择760℃灼烧去除复合碳铁合金中的游离碳后，试样以硫磷混酸溶解，加盐酸，用SnCl2还原大部分的Fe3+为Fe2+，再用TiCl3定量还原剩余的Fe3+，用钨酸钠指示还原终点；再以二苯胺磺酸钠为指示剂，用重铬酸钾标准溶液滴定TFe量，测定结果满意，相对标准偏差≤0.21%（n=6）。
實驗選擇760℃灼燒去除複閤碳鐵閤金中的遊離碳後，試樣以硫燐混痠溶解，加鹽痠，用SnCl2還原大部分的Fe3+為Fe2+，再用TiCl3定量還原剩餘的Fe3+，用鎢痠鈉指示還原終點；再以二苯胺磺痠鈉為指示劑，用重鉻痠鉀標準溶液滴定TFe量，測定結果滿意，相對標準偏差≤0.21%（n=6）。
실험선택760℃작소거제복합탄철합금중적유리탄후，시양이류린혼산용해，가염산，용SnCl2환원대부분적Fe3+위Fe2+，재용TiCl3정량환원잉여적Fe3+，용오산납지시환원종점；재이이분알광산납위지시제，용중락산갑표준용액적정TFe량，측정결과만의，상대표준편차≤0.21%（n=6）。
After being burned at 760℃selected by test for removing free carbon in carbon iron alloy, the sample was dissolved by the mixture solution of sulfuric acid and phosphoric acid. Adding hydrochloric acid, the most Fe3+was reduced to Fe2+by SnCl2, and then the residual Fe3+was reduced quantitatively by TiCl3, at the same time, sodium tungstate was used to indicate the reducing end. With sodium diphenylamine sulfonate as indicator, the TFe content was titrated by potassium dichromate standard solution. The satisfactory results were obtained and the relative standard deviation≤0.21%(n=6).
