Influence of stress and pH on susceptibility of copper-containing type 304 stainless steels to stress corrosion cracking in sulfuric acid
- Shinshu Univ., Nagano (Japan)
Stress corrosion tests on type 304 (UNS S30400) stainless steels (SS) with 0.3 wt% or 1.3 wt% Cu addition were conducted in hot sulfuric acid-sodium hydroxide solutions under constant loads. Cracking susceptibility, corrosion morphology, average crack growth rate (CGR), and average uniform corrosion rate were examined as functions of pH, sulfate ion concentration, and applied stress. The steel with 0.3 wt% Cu exhibited stress corrosion cracking from pH 0.3 to 2.4, in which range the CGR was greater than the corrosion rate. The steel with 1.3 wt% Cu exhibited pit-like attack, crevice corrosion, pit-like attack with cracking, or cracking, depending upon pH ({minus}0.3 to 0.3) and stress level (150 MPa to 325 MPa).
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 260654
- Journal Information:
- Corrosion, Journal Name: Corrosion Journal Issue: 7 Vol. 52; ISSN 0010-9312; ISSN CORRAK
- Country of Publication:
- United States
- Language:
- English
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