Role of water, acetic acid and chloride on corrosion and pitting behaviour of carbon steel in fuel-grade ethanol

Effect of MnS inclusion dissolution on carbon steel stress corrosion cracking in fuel-grade ethanol

“…It can be that the chlorides cause acidification of the SCC cracks during the N-SSR testing, which explains the high MnS dissolution rate. It has been reported that chlorides are needed to initiate pitting in FGE [6,16]. This also supports the idea that chlorides acidify the SCC crack and the pHe within the SCC crack depends on the chloride concentration.…”

“…The roles of different environmental parameters on the ethanol SCC are well known [2,[4][5][6][7][8][9][10][11][12][13][14][15][16], but the conditions within the ethanol SCC crack are still not known very well. One way to get information of the conditions within the SCC crack is to study the dissolution of the manganese sulfide inclusions.…”

Corrosion of martensitic stainless steel in ethanol-containing gasoline: Influence of contamination by chloride, H 2 O and acetic acid

“…This study did not include a variation of the simulated fuel composition. The influence of water, acetic acid and chloride-concentration on the corrosion behaviour of carbon steel in fuel-grade ethanol has been studied (albeit not in fuel-ethanol blends) [29], indicating the important role of water in inducing corrosion. An initial increase of the water concentration (in the regime of low concentrations) led to an increase of pitting corrosion, whereas even higher water concentrations were found to reduce corrosion.…”

Anticorrosive Influence of Acetobacter aceti Biofilms on Carbon Steel

“…A priori expectations might be that lower pH would lead to an increase in corrosion rate, as has been shown in abiotic steel corrosion tests 27 , and in tests contrasting the presence versus absence of A. aceti and biologically-produced acetic acid 18 . Sowards et al demonstrated a sharp increase in stress corrosion cracking in the presence of A. aceti , relative to abiotic controls that were close to neutral pH with no exogenous acetic acid present.…”