Effect of Load on the Corrosion Behavior of L80-13Cr Stainless Steel in MgCl2 Solution
Under stress,corrosion often occurs in L80-13Cr stainless steel.We evaluated the influence of different stresses on the corrosion susceptibility of L80-13Cr stainless steel and explored the causes of this phenomenon.Using metallographic microscopy,optical microscopy,scanning electron microscopy,and X-ray diffraction,we investigated the effect of loading on the corrosion behavior of L80-13Cr stainless steel in an MgCl2 solution with a Cl-concentration of 5000mg/L.The results showed that increasing the load accelerated the corrosion of the samples.With increasing load under the same conditions,more corrosion sites and pits appeared,and the corroded area expanded.The surfaces of the samples exhibited more tiny corrosion particles and microcracks,and the corrosion products transformed from Fe2O3 to FeS2 and NiO.After removing the corrosion products,the number and size of corrosion pits on the sample surfaces increased,and the surface roughness of the corrosion layer observed in cross-sections also increased.
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