1、 KS D 0270KSKSKSKSSKSKSKS KSKSKS SKSKS KSKS SKS KS KS D 0270：2007(2012 ) 2007 8 28 http:/www.kats.go.krKS D 0270： 2007 ： ( ) ( ) ( ) ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ：2007 8 28 ：2012 12 19 20120732 ： ： ( 02-509-7274) (http:/www.kats.go.kr). 10 5 , . KS D 0270： 2007 (2012 ) Test methods for
2、 critical crevice temperature and/of stainless steels 1 . , , . , . 2 . . KS D 0219, 2 KS D 0238, KS D 0269, 3 3.1 (critical crevice temperature) 0.025 mm . 3.2 (critical crevice potential) (anodic direction) , (repassivation) . 4 KS D 0270： 2007 2 4.1 , . . 4.2 (5.6) (5.7) . 4.3 2 5 24 , . , , 0.02
3、5 mm . 4.4 (501) (200 ppm ) , 30 mV/min 200 A , 200 A 2 10 mV/min 50 A . 50 A 2 , 10 mV . 2 , . 5 , (water bath) . 5.1 1 000 mL, , 40 mm . 5.2 40 mm . 300 mm , 150200 mm . 5.3 , , . 5.4 . . 5.5 , (water bath) KS D 0270： 2007 3 0(851) . 5.6 1 5.6.1 (TFE-fluorocarbon blocks) 12.7 mm O 1.6 mm . 1 . 5.6
4、.2 O 20 mm, 30 mm O , O 1.75 mm . No12(38 mm) No14(51 mm) . 1 O 5.7 2 5.7.1 (Multiple Crevice Assembly： MCA) (TFE-fluorocarbon segmented washer) , 2 . 1.6 mm 12.7 mm12.7 mm 30 mm20 mm1.6 mmKS D 0270： 2007 4 mm inch mm inch mm inch (slope) 6.73 0.265 15.9 0.525 6.34 0.100 12 2 6 6.1 / (potentio/galva
5、nostat)1), (potential-sweep), 2), , . 3 . 1) KS D 0238 . 2) (potential-sweep) . KS D 0270： 2007 5 3 7 7.1 6.35 mm(1/4 inch) (torque limiting nut driver) . 7.2 (： 20 ) . 7.3 . 7.4 0.000 1g . 7.5 . 8 8.1 2 (FeCl36H2O) 68.72 g 600 mL , 16 mL (36.538 % HCl) . 6 % FeCl3 1 % HCl . 330 mg (200 ppm ) 1 L (5
6、01) . 8.2 99.99 % . / KS D 0270： 2007 6 9 9.1 25 mm50 mm , . 9.2 , . 9.3 (sleeve) . 9.4 , . O . 9.5 .3) . 9.6 . 9.7 , . 9.8 0.001 g . 10 10.1 , . 4 . . (torque) 0.28 Nm(40 inch-oz) . Ti Ti 4 3) 2030 % 50 1 . KS D 0270： 2007 7 10.2 1 000 mL 2 (6 %FeCl3 1 %HCl) 600 mL , . 10.3 1 000 mL , 150 mL . 10.4
7、 . A . 5 . 0 85 . . 24 . 10.5 , . . . 10.6 0.025 mm . 10.6.1 0.025 mm , 5 10.110.6 . 10.6.2 0.025 mm , 10 10.110.6 . 11 11.1 1 L 330 mg (200 ppm ) (50 1) . . 11.2 ( ) 30 mV/min ( ) 200 A . 11.3 200 A 200 A 2 . , (20020) A . 11.4 2 200 A , 10 mV 2 10 mV . .4) 2 200 A , 10 mV/min 50 A 2 10 mV .5) , .
8、4) 5 . 5) 5 . KS D 0270： 2007 8 5 12 12.1 6) . , , . O . 12.1.1 . 12.2 (20 ) , . . 12.3 . , 10 . 12.4 , . 12.5 . 12.5.1 11.4 2 . 6) 0.000 1 g/cm2 . 30 mV/min 10 mV/min 10 mV 200 A 2 500 A 2 KS D 0270： 2007 9 12.5.2 10 . . , . 40 m . 13 13.1 13.1.1 , , , , , . 13.1.2 25 mm50 mm . 13.1.3 0.025 mm . 13
9、.1.4 . 13.2 13.2.1 . 13.2.2 . 13.2.3 . 13.2.4 . 13.2.5 . KS D 0270： 2007 10 A ( ) A.1 (CCT) . , ( C 1 ). CCT( )=(1.5mass%Cr) (1.9mass%Mo) (4.9mass%Nb) (8.6mass%W) 36.2 , ( C 2, 3 ). CCT( )=(3.2mass%Cr) (7.6mass%Mo) (10.5mass%N) 81.0 KS D 0270： 2007 11 B ( ) , B.1 B.1 (CCP) (CCT) (PREN)7) . . . B.1 (
10、 C 5 ) B.2 B.2 . . ( , ) = 2.86 ( ) 1.54 7) (PREN, pitting resistance equivalent index) ( C 4 ) PREN = 1mass%Cr 3.3mass%Mo 36mass%N 7mass%Momass%N 1.6mass%Mn (VSCE8) = 0.031 ( ) 0.077 8) (SCE： Saturated Calomel Electrode) 1.00.80.40.60.20.0 0.220 25 30 35 40 45 50 55 60 650 102030405060CCP(330 mg/L
11、NaCl, 50 )CCT() CCP(Vsce) PREN CCT(washer-type) KS D 0270： 2007 12 B.2 ( C 5, 6 ) 20 25 30 35 40 45 50 55 60650 102030405060CCT(waher-type) CCT() CPT 0 102030405060PREN CPT() KS D 0270： 2007 13 C 1 E. L. Hibner, Materials Performance 26 (1987) 37 2 H. J. Dundas and A. J. Bond, Paper No. 206, NACE CO
12、RROSION/85 Conference, March 25-27, Boston, MA, 1985 3 R. J. Bringham, Corrosion 30 (1974) 396 4 R.F.A. Jargelius-Pettersson, Corrosion 54 (1998) 162 5 , “ ”, 2005 6 , “ ”, 2004 7 ASTM G 5, Reference test method for making potentiostatic and potentiodynamic anodic polarization measurements 8 ASTM G
13、48, Standard test methods for pitting and crevice corrosion resistance of stainless steels and related alloys by use of ferric chloride solution 9 ASTM G 150, Standard test methods for electrochemical critical pitting temperature testing of stainless steels 10 JIS G 0592, Method of determining the r
14、epassivation potential for crevice corrosion of stainless steels 153787 1 145 3(16) (02)26240114 (02)26240148 http:/ KS D 0270： 2007KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Test methods for critical crevice temperature and/of stainless steels ICS 77.140.20 Korean Agency for Technology and Standards http:/www.kats.go.kr
