Institutional Repository

Effect of tempering temperature and time on the corrosion behaviour of 304 and 316 austenitic stainless steels in oxalic acid

UnisaIR/Manakin Repository

Show simple item record

dc.contributor.author Afolabi, A.S. en
dc.contributor.author Potgieter, J.H. en
dc.contributor.author Abdulkareem, A.S. en
dc.contributor.author Fungura N. en
dc.date.accessioned 2012-11-01T16:31:41Z
dc.date.available 2012-11-01T16:31:41Z
dc.date.issued 2011 en
dc.identifier.citation World Academy of Science, Engineering and Technology en
dc.identifier.citation 79 en
dc.identifier.issn 2010376X en
dc.identifier.uri http://hdl.handle.net/10500/7600
dc.description.abstract The effect of different tempering temperatures and heat treatment times on the corrosion resistance of austenitic stainless steels in oxalic acid was studied in this work using conventional weight loss and electrochemical measurements. Typical 304 and 316 stainless steel samples were tempered at 150°C, 250°C and 350°C after being austenized at 1050°C for 10 minutes. These samples were then immersed in 1.0M oxalic acid and their weight losses were measured at every five days for 30 days. The results show that corrosion of both types of ASS samples increased with an increase in tempering temperature and time and this was due to the precipitation of chromium carbides at the grain boundaries of these metals. Electrochemical results also confirm that the 304 ASS is more susceptible to corrosion than 316 ASS in this medium. This is attributed to the molybdenum in the composition of the latter. The metallographic images of these samples showed non-uniform distribution of precipitated chromium carbides at the grain boundaries of these metals and unevenly distributed carbides and retained austenite phases which cause galvanic effects in the medium. en
dc.language.iso en en
dc.subject ASS; Corrosion; Oxalic acid; Temperature; Tempering; Time 316 austenitic stainless steel; 316 stainless steel; ASS; Chromium carbide; Corrosion behaviour; Electrochemical measurements; Galvanic effect; Metallographic images; Non-uniform distribution; Oxalic acid; Retained austenite; Tempering temperature; Time; Treatment time; Weight loss; Austenite; Austenitic stainless steel; Carbides; Chromium; Corrosion resistance; Corrosion resistant alloys; Grain boundaries; Grain size and shape; Heat resistance; Molybdenum; Tempering; Organic acids en
dc.title Effect of tempering temperature and time on the corrosion behaviour of 304 and 316 austenitic stainless steels in oxalic acid en
dc.type Article en


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search UnisaIR


Browse

My Account

Statistics