1、 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS 2001 12 31 KS D ISO 6437 KS D ISO 6437: 2001 (2006 )(ISO 6437: 1984, IDT) ICS 77.120.30 KS D ISO 6437: 2001(2006 )(ISO 6437: 1984, IDT)Copper alloysDetermination of chromium content Titrimetric method 1984 ISO 6437, Copper alloys Determination of chromium c
2、ontent - Titrimetric method . . 1. . 0.102.0 %(m/m) . 2. . Cr(III) . Cr(VI) (II) , . 3. ( , ) . 3.1 =1.19 g/mL 3.2 =1.40 g/mL 3.3 =1.13 g/mL 3.4 =1.61 g/mL 3.5 =1.83 g/mL 3.6 (1:20) (3.1) 5 mL 100 mL . 3.7 (1:2) 100 mL( =1.70 g/mL) 200 mL . 3.8 2.5 g/L 2.5 g 1 000 mL . 3.9 , 2 g/L 0.2 g (3.5) 100 mL
3、 . 3.10 1.733 g Cr/L (K2Cr2O7) 4.903 3 g 0.000 1 g . 1 000 mL . 1 mL 1.733 mg . 3.11 (II) 46 g/L (II) 46 g (1mol/L) 1 L . 3.11.1 (3.5) 54 mL 1 L . (II) 6 Fe(NH4)2(SO4)2 D ISO 6437:2001 2 6H2O , . 1 mL Cr 2 mg . 3.11.2 3.11.2.1 (3.10) 20 mL 400 mL , 25 mL ( ) (3.7) 150 mL . (3.9) 0.1 mL , (II) (3.11)
4、 , . (II) Cr (mg/mL) . 733.121cr=VVC V1: (mL) V2: (II) (mL) 3.11.2.2 (3.10) 30 mL (3.5) 15 mL (3.7) 25 mL, 330 mL 600 mL , 5.4.2 . (II) Cr (mg/mL) 3.11.2.1 . (II) . 4. 4.1 600 mL 4.2 5. 5.1 2 g 0.001 g . . 5.2 (5.1) 6 00mL (4.1) , (3.1) 20 mL (3.2) 10 mL, (3.3) 1 mL . (3.7) 10 mL (3.4) 30 mL . . , 5
5、 . 30 mL 5 . 5.3 (III) (5.2) 150 mL . (3.8) 5 mL . 3 (3.6) 10 mL 15 . 5.4 5.4.1 (5.3) (3.7) 25 mL (3.9) 0.1 mL . (II) (3.11) , . 5.4.2 (5.3) 600 mL (3.5) 20 mL (3.7) 25 mL . 400 mL . , (II) (3.11) . . 200 mV , 900700 mV . D ISO 6437:2001 3 5.5 5.1 5.4 . 6. (Cr) . Cr(wt %)mCV10cr V: (5.4) (II) (3.11)
6、 (mL) Ccr: 3.11.2 (II) (3.11) m: (g) 7. . a) b) c) d) e) : : 2001 12 31 : 2006 10 2 2006-0451 : : ( ) ( 02 509 7230) . 7 5 , . 701-7 6009-4567, 6009-48878 http:/ KS D ISO 6437:2001 (ISO 6437: 1984, IDT) Copper alloysDermination of chromium contentTitrimetric methodICS 77.120.30 : : 2006 10 2 : 2001 12 31 2006-0451 : : ( ) KSKSKSSKSKS KSKS SKS KSKS SKSKS KSKSKS