Low freshwater availability in northern Chile means that many mining companies use seawater for several different processes. The present study analyzes the corrosion behavior of API 5L X65 steel and ASTM 53-B steel in seawater taken from the coast of northern Chile. Electrochemistry (polarization curves) and mass loss (flow simulation) techniques are used. The results obtained from the (static) electrochemical testing give the corrosion potential, corrosion current, corrosion rate, passivity current and pitting potential. All measurements show improved corrosion behavior in seawater for the API 5L X65 steel. The total corrosion rate, which includes the corrosion and erosion processes for the materials in the flow simulation system, was 0.41 μm year-1 at day 10 for the API 5L X65 steel and 0.59 μm year-1 at day 10 for the ASTM A53-B steel. Scanning microscopy observations show the presence of pitting, more so for the ASTM A53-B steel.
|Number of pages||12|
|Journal||International Journal of Electrochemical Science|
|State||Published - 2015|
- API 5L X65 carbon steel
- ASTM A53-B carbon steel