Abstract
The objective of this work is to investigate the influence of the crystallographic texture on the corrosion resistance of 16% Cr ferritic stainless steel. Samples of ASTM S43000 ferritic stainless steel, both niobium-stabilised and non-stabilised, were used. The samples were subjected to crystallographic characterisation (EBSD) and analysed using an inverse pole figure (IPF) and a crystalline orientation distribution function (CODF). The samples also underwent anodic potentiodynamic polarisation tests (deaeration by high-purity argon gas) in 3.56% NaCl and 1N H2SO4 solutions, and the surface was examined by SEM after the tests. The results showed a clear influence of the crystallographic texture on the corrosion resistance. The niobium decreases the amount of the preferred orientation and thus the influence of the texture on the corrosion resistance, although the corrosion resistance of the stainless steel is increased as niobium carbides are formed.
Highlights
The global production of stainless steel in 2012 reached approximately 38.1 million tons, which is almost twice as much as ten years ago[1]
This evolution can only succeed if the phenomena affecting the properties of stainless steel and the interrelations between said phenomena are well-understood
It is quite important to obtain a wider knowledge about corrosion in stainless steel and the interactions of different phenomena, for example, tribological phenomena
Summary
The global production of stainless steel in 2012 reached approximately 38.1 million tons, which is almost twice as much as ten years ago[1]. This fact justifies the need to obtain more information about this material, and its increasing production calls for the need to investigate more economical solutions. The demand for stainless steel continues to grow, and this includes the demand for improvements in the material. This evolution can only succeed if the phenomena (corrosion, abrasion, etc) affecting the properties of stainless steel and the interrelations between said phenomena are well-understood. Improvements in stainless steel research can help spur further studies
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