Enhancing corrosion resistance of additively manufactured 316L stainless steel by fabricating pillar arrays

Liu，Qian; Lu，Jiajun; Luo，Zairan; Yi，Jiang; He，Minglin; Zhao，Yonghua; Wang，Shuai

2023-06-01

10.1016/j.matdes.2023.111940

Materials and Design   影响因子和分区

0264-1275

1873-4197

By using the electrochemical etching technique, pillar arrays with a size of ∼50–200 nm are fabricated on the surface of 316L manufactured by laser powder bed fusion. The nanopillars morphology is induced by the selective anodic dissolution of dislocation cell walls that are decorated with high local concentrations of Cr/Fe/Ni solute atoms. The appearance of pillar arrays extends the passivation range and increases the pitting potential of 316L in HNO solution, while the corrosion current density decreases in NaNO solution. The enhanced corrosion resistance was attributed to the coeffect of elimination of corrosion-sensitive features and hydrophobicity prompted by electrochemical etching.

316L Cellular structure Corrosion behavior Electrochemical etching Laser powder bed fusion

SCI ; EI

英语

第一 ; 通讯

National Key Ramp;D Program of China[2022YFB4600700] ; Shenzhen Science and Technology Innovation Commission["JCYJ20210324104414040","20220815150609002"] ; Key -Area Research Project of the Guangdong Province Department of Education[2022ZDZX3021]

Materials Science

Materials Science, Multidisciplinary

WOS:001040195300001

ELSEVIER SCI LTD

20231714011764

Austenitic stainless steel ; Corrosion resistance ; Corrosive effects ; Electrochemical corrosion ; Electrochemical etching ; Morphology ; Nitrogen compounds ; Sodium nitrate ; Steel corrosion

Metals Corrosion:539.1 ; Steel:545.3 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85153383631

Scopus

Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Liu，Qian,Lu，Jiajun,Luo，Zairan,et al. Enhancing corrosion resistance of additively manufactured 316L stainless steel by fabricating pillar arrays[J]. Materials and Design,2023,230.

Liu，Qian.,Lu，Jiajun.,Luo，Zairan.,Yi，Jiang.,He，Minglin.,...&Wang，Shuai.(2023).Enhancing corrosion resistance of additively manufactured 316L stainless steel by fabricating pillar arrays.Materials and Design,230.

Liu，Qian,et al."Enhancing corrosion resistance of additively manufactured 316L stainless steel by fabricating pillar arrays".Materials and Design 230(2023).