Abstract
The influence of Sn addition on the corrosion behaviour of hot-pressed sintered stainless steel of type 316 in H2SO4 solutions was investigated. The samples were investigated by SEM observation, open circuit potential during an immersion test and potentiodynamic polarization. It was found that Sn additions of 0.5-3 wt% enhance the densification processes and as a result the amount of the interconnected open pores was decreased. The corrosion resistance of hot-pressed sintered stainless steel was substantially improved by the Sn addition. The weight loss of the samples containing Sn is negligible after 200 h of immersion compared to corrosion. The potentiodynamic measurements indicate that as a result of the Sn addition, the critical current density and the passivation current density were decreased, as compared to the hot-pressed stainless steel. The cathodic polarization curves indicate surface poisoning, causing higher over-potential for the hydrogen evolution.
| Original language | English |
|---|---|
| Pages (from-to) | 883-888 |
| Number of pages | 6 |
| Journal | Corrosion Science |
| Volume | 25 |
| Issue number | 10 |
| DOIs | |
| State | Published - 1 Jan 1985 |
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- General Materials Science
