The intergranular corrosion (IGC) susceptibility of the Ti–Nb-stabilised ultra-pure 430LX FSSs with 0-0.47 wt-% tin addition was investigated using double loop electrochemical potentiokinetic reactivation (DL-EPR) and oxalic acid etch tests. The result of DL-EPR test reveals that IGC resistance increases with the increase in tin content. The specimens with different contents of tin exhibit the same microstructural evolution based on oxalic acid etch test. M23C6 precipitates form along grain boundaries, inducing Cr-depleted zones and finally resulting in the susceptibility to IGC. Tin addition gives rise to the formation of SnO2 on the FSSs surface, thus inhibiting the attack of corrosive ions towards Cr-depleted zones.
SunMYangYYLuoM. Investigation of susceptibility to intergranular corrosion of Tin-added austenitic stainless steel. Acta Metall Sin Lett. 2015; 28: 1183–1189. doi: 10.1007/s40195-015-0311-z
5.
YangYYLiuYYChengML. Enhancements of passive film and pitting resistance in chloride solution for 316LX austenitic stainless steel after Sn alloying. Acta Metall Sin Engl Lett. 2019; 32: 98–106. doi: 10.1007/s40195-018-0855-9
6.
HatanoMMatsuyamaHIshimaruE. Development of Sn-added low interstitial ferritic stainless steel sheet with high corrosion resistance and low Cr content. Mater Jpn. 2013; 52: 180–181. doi: 10.2320/materia.52.180
7.
HanJPLiYJiangZH. Summary of the function of Sn in iron and steel. Adv Mater Res. 2013; 773: 406–411. doi: 10.4028/www.scientific.net/AMR.773.406
8.
YangBTongHLiuY.Effects of Sn microalloying on cold rolling and recrystallization textures and microstructure of a ferritic stainless steel. Mater Charact. 2018; 137: 142–150. doi: 10.1016/j.matchar.2018.01.022
9.
TongHYangBLiuX. Effect of Sn micro-alloying on recrystallization nucleation and growth processes of ferritic stainless steels. Met Mater Int. 2018; 24: 789–801. doi: 10.1007/s12540-018-0098-3
10.
JiangZHHanJPLiY. High temperature ductility and corrosion resistance property of novel tin-bearing economic 17Cr–xSn ferritic stainless steel. Ironmak Steelmak. 2015; 42: 504–511. doi: 10.1179/1743281214Y.0000000255
11.
HanJPJiangZHLiY.Investigation of corrosion resistance property and passivation film structure of tin containing stainless steel. Mater Res Innov. 2014; 18: 76–78. doi: 10.1179/1433075X13Y.0000000163
12.
ZhanZSunMJiangY. Effect of tin on the corrosion resistance of 16 Cr ferritic stainless steel in acidic solution and chloride-containing media. Int J Electrochem Sci. 2016; 11: 3963–3975. doi: 10.20964/110414
13.
ZhangXJLiuZY.Presented at IUMRS-ICA 2016, Qingdao, China, 20-24 October, 2016.
14.
ParkJHSeoHSKimKY.Alloy design to prevent intergranular corrosion of low-Cr ferritic stainless steel with weak carbide formers. J Electrochem Soc. 2015; 162: C412–C418. doi: 10.1149/2.1001508jes
15.
ChengPZhongNDaiN. Intergranular corrosion behavior and mechanism of the stabilized ultra-pure 430LX ferritic stainless steel. J Mater Sci Technol. 2019; 35: 1787–1796. doi: 10.1016/j.jmst.2019.03.021
16.
BondAP.Mechanisms of intergranular corrosion in ferritic stainless steels. Trans Metall Soc AIME. 1969; 245: 2127–2134.
17.
LiXLNiYFJiangYM. Intergranular corrosion of low Cr ferritic stainless steel 429 evaluated by the optimized double loop electrochemical potentiokinetic reactivation test. Adv Mater Sci Eng. 2015; 2015: 1–10.
18.
QiangSJiangLLiJ. Evaluation of intergranular corrosion susceptibility of 11Cr ferritic stainless steel by DL-EPR method. Acta Metall Sin. 2015; 51: 1349–1355.
19.
KimJKKimYHLeeBH. New findings on intergranular corrosion mechanism of stabilized stainless steels. Electrochim Acta. 2011; 56: 1701–1710. doi: 10.1016/j.electacta.2010.08.042
20.
DevineTMRitterAM.Sensitization of 12 Wt Pct chromium, titanium-stabilized ferritic stainless steel. Metall Trans A. 1983; 14: 1721–1728. doi: 10.1007/BF02654400
21.
GatesJDJagoRA.Effect of nitrogen contamination on intergranular corrosion of stabilized ferritic stainless steels. Met Sci J. 1987; 3: 450–454.
22.
LakshminarayananAKBalasubramanianV.Use of DL-EPR test to assess sensitization resistance of AISI 409M grade ferritic stainless steel joints. J Mater Eng Perform. 2013; 22: 2293–2303. doi: 10.1007/s11665-013-0521-3
23.
ScaliseTCLopes de OliveiraMCSayegIJ. Sensitization behavior of type 409 ferritic stainless steel: confronting DL-EPR test and practice W of ASTM A763. J Mater Eng Perform. 2014; 23: 2164–2173. doi: 10.1007/s11665-014-1010-z
24.
DengBJiangYMXuJL. Application of the modified electrochemical potentiodynamic reactivation method to detect susceptibility to intergranular corrosion of a newly developed lean duplex stainless steel LDX2101. Corros Sci. 2010; 52: 969–977. doi: 10.1016/j.corsci.2009.11.020
25.
GongJJiangYMDengB. Evaluation of intergranular corrosion susceptibility of UNS S31803 duplex stainless steel with an optimized double loop electrochemical potentiokinetic reactivation method. Electrochim Acta. 2010; 55: 5077–5083. doi: 10.1016/j.electacta.2010.03.086
26.
SidhomHAmadouTBrahamC.Evaluation by the double loop electrochemical potentiokinetic reactivation test of aged ferritic stainless steel intergranular corrosion susceptibility. Metall Mater Trans Part A. 2010; 41: 3136–3150. doi: 10.1007/s11661-010-0383-3
27.
ASTM A763-93(2009). Standard practices for detecting susceptibility to intergranular attack in ferritic stainless steels. West Conshohocken (PA): ASTM International; 2009.
28.
Leiva-GarcíaRMuñoz-PorteroMJGarcía-AntónJ.Evaluation of alloy 146, 279, 900, and 926 sensitization to intergranular corrosion by means of electrochemical methods and image analysis. Corros Sci. 2009; 51: 2080–2091. doi: 10.1016/j.corsci.2009.05.036
29.
GuoLQLinMCQiaoLJ. Duplex stainless steel passive film electrical properties studied by in situ current sensing atomic force microscopy. Corros Sci. 2014; 78: 55–62. doi: 10.1016/j.corsci.2013.08.031
30.
LuoHDongCFXiaoK. Characterization of passive film on 2205 duplex stainless steel in sodium thiosulphate solution. Appl Surf Sci. 2011; 258: 631–639. doi: 10.1016/j.apsusc.2011.06.077
31.
HongJHanDTanH. Evaluation of aged duplex stainless steel UNS S32750 susceptibility to intergranular corrosion by optimized double loop electrochemical potentiokinetic reactivation method. Corros Sci. 2013; 68: 249–255. doi: 10.1016/j.corsci.2012.11.024
WangRZhengZZhouQ. Effect of surface nanocrystallization on the sensitization and desensitization behavior of super304H stainless steel. Corros Sci. 2016; 111: 728–741. doi: 10.1016/j.corsci.2016.06.012
34.
HongLSuHLiB. Electrochemical and passive behaviour of tin alloyed ferritic stainless steel in concrete environment. Appl Surf Sci. 2018; 439: 232–239. doi: 10.1016/j.apsusc.2017.12.243
35.
SunMLuoMLuC. Effect of alloying tin on the corrosion characteristics of austenitic stainless steel in sulfuric acid and sodium chloride solutions. Acta Metall Sin. 2015; 28: 1089–1096. doi: 10.1007/s40195-015-0299-4
36.
JainSBudianskyNDHudsonJL.Surface spreading of intergranular corrosion on stainless steels. Corros Sci. 2010; 52: 873–885. doi: 10.1016/j.corsci.2009.11.006
37.
HouseCIKelsallGH.Potential-pH diagrams for the Sn/H2O-CI system. Electrochim Acta. 1984; 29: 1459–1464. doi: 10.1016/0013-4686(84)87028-0
38.
KongDDongCNiX. Insight into the mechanism of alloying elements (Sn, Be) effect on copper corrosion during long-term degradation in harsh marine environment. Appl Surf Sci. 2018; 455: 543–553. doi: 10.1016/j.apsusc.2018.06.029
