1、 KSKSKSKS KSKSKSK KSKSKS KSKSK KSKS KSK KS KS D 0269 KS D 0269 :2009 2009 12 30 http:/www.kats.go.krKS D 0269:2009 : ( ) ( ) () POSCO () () () () () KIST () ( ) : (http:/www.standard.go.kr) ： ： 2005 12 28 ： 2009 12 30 2009-0988 ： ： ( 02-509-7274) (http:/www.kats.go.kr). 10 5 , . KS D 0269:2009 Poten
2、tiostatic polarization test method for determination of critical pitting temperature for stainless steels (pitting potential) . , . ASTM G 150, Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels , . 1 . , , , , . 1) . , . SI . , . 2 . . ( ) . KS D 0219,
3、 KS D 0238, KS M ISO 63532, 2：1 KS M ISO 6587, , ASTM G 5, Stamdard Reference Test Method for Making Potentiostatic and Potentiodynamic Anodic 1) ：Critical Pitting Temperature( CPT .) KS D 0269:2009 2 Polarization Measurements ASTM G 46, Standard Guide for Examination and Evaluation of Pitting Corro
4、sion ASTM G 48, Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution 3 3.1 . 3.1.1 3.1.2 3.1.3 , ( B ) 3.1.4 ( B ) 3.1.5 (CPT 700 CPT) 700 mV , CPT 700 CPT . 3.1.6 200 (CPT 200 ) 700 mV , (PREN) 25 (SCE) 200 mV 2
5、00 (CPT 200 ) ( B ). 3.1.7 (/ ) 4 ( 1 ). 1 mol 0 ( 40 3 , 40 30 ) . 1 . 60KS D 0269:2009 3 , . , 700 mV( ) . (PREN) 25 , 700 mV 200 mV . , , 60 100 A/cm 2 . . 1 5 . , , . , . . 6 6.1 , , , . . . (potentiostat) 6.2 10 mA/cm 2 1 mV . (open circuit potential) , . 6.3 30.0 35.0 40.0 45.0 50.0 55.0 60.0
6、CPT 200 250 150 100 50 0 T() i A/cm 2 KS D 0269:2009 4 KS D 0238 . 6.4 5 % . 1 10 A/cm 2 . 6.5 0 100 . 0 100 1 / . 10 , (1.00.3) /, 10 . 6.6 0.4 . 6.7 6.7.1 ASTM G 5 ASTM G 5 , . 6.7.2 (flushed port cell) C , . , , . , 100 mL/cm 2 . 15 % . 6.8 6.8.1 , , . 6.8.2 . C . , . 6.9 6.9.1 1 , . 6.9.2 KS D 0
7、269:2009 5 . 5 mV . (salt bridge) . 5 mV . . 7 . 7.1 6.8 . 7.2 1 cm 2 . 7.3 . 8 8.1 KS M ISO 6587 , KS M ISO 63532(R32) 58.45 g 1 L 1 M . . 8.2 (purging gas) , 99.99 % . 9 9.1 , (25 ) 700 mV . 9.2 25 , 800 mV , 700 mV 800 mV . , . 700 mV , (PREN) 25 200 mV KS D 0269:2009 6 200 CPT 200 . 10 10.1 , .
8、. 10.2 8. , 3 . 10.3 . 10.4 , , . 10.5 3 . 10.6 . , . 10.7 . 10.8 . 10 (01) . 10.9 . 10.10 . 2 . 10.11 . (605) . 10.12 1 . . 100 A/cm 2 60 . 10.13 . 95 % , . 11 11.1 ( 20) . , , , . 11.2 , . 12 12.1 , 1 . 12.2 KS D 0269:2009 7 12.2.1 100 A/cm 2 60 ( 1 ). . , 100 A/cm 2 , 60 , . 12.2.2 12.2.2.1 ( ) (
9、 ) , . 12.2.2.2 , . 12.2.2.3 . , .12.2.2.4 . B . 13 . a) b) , 10 10 10 700 mV 200 mV , 200 CPT 200 . c) . , . d) e) f) g) h) i) , . j) , . k) . , , , , , , , , KS D 0269:2009 8 A () A.1 . A.2 , , . A.3 . , 2 . A.4 . A.4.1 10 10 . A.4.2 (linear order regression analysis) . A.4.3 . A.4.4 . . A.4.5 0.4
10、 . KS D 0269:2009 9 B () B.1 . , B.1 . B.1 B.2 4 B.2 , ( B.1 ). B.3 () 2.5 13 23.5 41 ( A/cm 2 ) 316 L(0 % N) 316 LN(0.042 % N) 316 LN(0.103 % N) 316 LN(0.151 % N) KS D 0269:2009 10 . B.1 , . B.3.1 . B.3.2 . B.3.3 . B.4 (SCE) 700 mV , . B.5 700 mV 100 mV , . , . B.6 (PREN) 25 , 700 mV , 200 mV , 200
11、 CPT 200 ( B.1, B.3 ). B.1 4 Fe-17, 21, 25 wt% Cr STS #1 STS #2 STS #3 STS #4 Fe-17Cr Fe-21Cr Fe-25Cr PREN 18.3 15.6 18.4 21.0 17.0 20.8 24.8 PREN1mass%Cr3.3mass%Mo36mass%N7mass%Momass%N1.6mass%Mn B.3 (PREN) 25 4 Fe-17, 21, 25 wt% Cr 200 (CPT 200 ) ( A/cm 2 ) () KS D 0269:2009 11 C () C.1 (flushed p
12、ort cell) C.1.1 , , , . C.1 . C.1 C.1.2 , . (purified distilled water) . C.1.3 1 , , . . (port opening) 1 cm 2 4 5 mL/h . . C.1.4 . , . C.1.5 , ( .) . 2 O N 2 ( ) KS D 0269:2009 12 . C.1.6 , . C.2 G5 C.2.1 G5 , PTFE . C.2 G5 . C.2 G5 C.2.2 PTFE O (Oring) . , . 10 mm , 1.5 mL/h. C.2.3 . , . . . C.3 P
13、TFE O PTFE OKS D 0269:2009 13 C.3 C.3.1 , , , . C.3 . C.3.2 , . 2 mm , . 20 mm 50 mm 50 mL/h. C.3.3 , . (gas purging) . . KS D 0269:2009 14 KS D 0269:2009 , . 1 (pitting potential) . , . ASTM G 150, Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels . 2
