Effects of shot peening on corrosion and stress corrosion cracking behaviors of sensitized Alloy 600 in thiosulfate solution

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3293507· OSTI ID:5117614

Tsai, W T; Chang, C S; Lee, J T ^[1]

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1. National Cheng Kung Univ., Tainan (Taiwan, Province of China). Dept. of Materials Science and Engineering

Effects of shot peening on the corrosion and stress corrosion cracking (SCC) behaviors of sensitized alloy 600 (UNSN06600) were studied. Electrochemical potentiokinetic reactivation (EPR) tests in 0.01 M sulfuric acid (H[sub 2]SO[sub 4]) + 0.001 M potassium thiocyanate (KSCN) solution and immersion tests in boiling 25% nitric acid (HNO[sub 3]) solution were used to evaluate the effect of heat treatment on the degree of sensitization of alloy 600. Potentiodynamic polarization tests in 0.01 M sodium thiosulfate (Na[sub 2]S[sub 2]O[sub 3]) solution at 95 C revealed shot peening increased the anodic current density (CD) of the alloy. However, SCC tests using U-bend specimens indicated shot peening substantially increased the crack initiation time in the same environment. The delayed crack initiation of SCC for shot-peened alloy 600, which is potentially dependent, was attributed to the presence of compressive residual stresses and the severely deformed surface microstructure.

• OSTI ID: 5117614
• Journal Information: Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 50:2; ISSN 0010-9312; ISSN CORRAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOY-NI76CR15FE8
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COLD WORKING
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
FABRICATION
FRACTURE PROPERTIES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL 600
INCONEL ALLOYS
INTERGRANULAR CORROSION
IRON ALLOYS
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIMONIC
SHOT PEENING
STRESS CORROSION
SURFACE TREATMENTS
THIOSULFATES
TITANIU
TITANIUM ADDITIONS