Abstract
Crevice corrosion has become an important issue of the safety of AISI 304L austenitic stainless steel canister when exposed to the chloride environments located in coastal areas. Moreover, dust deposited on the canister surface may enhance the corrosion effect of 304L stainless steel. In this work, white emery was adopted to simulate the dust accumulated on the as-machined specimen surface. To investigate the effect of deposited white emery, chloride concentration, and relative humidity on the crevice corrosion behavior, an experiment was conducted on 304L stainless steel specimens at 45 °C with 45%, 55%, and 70% relative humidity (RH) for 7000 h. The surface features and crack morphology of the tested 304L stainless steel specimens were examined by SEM equipped with energy-dispersive spectrometry (EDS) and electron back scatter diffraction (EBSD). From the experimental results, a threshold RH for the stress corrosion cracking (SCC) initiation of AISI 304L austenitic stainless steel with different concentrations of chloride was proposed.
Highlights
IntroductionWhen dust containing chloride salts is deposited on canister surfaces, it creates an environment where water accumulates and corrodes the region, which can lead to localized crevice corrosion
The crevice corrosion behavior of 304L stainless steel with white emery deposited on the as-machined surface was inspected by testing the samples at 45 ◦ C under a combination condition of 0.1 g/m2 or 1 g/m2 chloride concentration and a relative humidity (RH) of 45%, 55%, or 70% RH
This could be accounted for by the fact that the chloride concentration of 0.1 g/m2 was so low that it could not initiate stress corrosion cracking in the specimens tested at lower relative humidity levels (45% and 55% RH)
Summary
When dust containing chloride salts is deposited on canister surfaces, it creates an environment where water accumulates and corrodes the region, which can lead to localized crevice corrosion. 304L underofthe combined earlysteel initiation corrosion [28].effect of accumulated dust, different chloride concentrations,The andaim relative humidity, results of researchcorrosion are expected to of this researchand wasthe to experimental survey the behavior of this the crevice of AISI contribute to evaluating the durability of 304L canisters located chloride in coastal areas. 304L stainless thermore, this research offers greatersurfaces knowledge ofadopted the initiation of stress corrosion cracksteel specimens with as-machined were in this work to accelerate the effect of crevice corrosion for dust accumulated on the specimens’ surfaces.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
