Effect of steel substrate for phosphate treatment: An option to simulate TMT rebar surface

A Review of Recent Developments in Coating Systems for Hot-Dip Galvanized Steel

“…When the pH value is 12∼14 (Yeomans, 2004), the galvanized layer is basically in a passivation state. Among the factors leading to the corrosion of HDGS reinforcement, CaCO 3 generated from the neutralization reaction of CO 2 in the air with Ca(OH) 2 in the pore fluid of the concrete and Cl − have the most serious impacts (Al-Mehthel et al, 2009;Manna, 2009). HDGS concrete is in a passivation state at saturated Ca(OH) 2 solution with a pH of 12∼13.…”

Effect of high temperature oxide scale on steel surface for electroless nickel plating process and characterization of coatings

“…Different pretreatment processes like alkali cleaning, rinsing, pickling, rinsing and surface activation all are necessary before electroless plating [13] on the steel surface. The oxide scale on the steel surface reduces [14] as well as increases [15,16] surface reactivity for specific treatment processes. The objective of this paper is to find out the effect of a high temperature iron scale on the steel surface on electroless deposition of nickel.…”

Corrosion resistance of water‐cooled rebar quenched in a novel agent

“…Carbon steel rebar is used extensively for composite construction of concrete structures (Manna, 2009). Rebar normally is air‐cooled after hot rolling.…”

“…Considerable research work has pointed out that the compositions and structure of the rebar scale, which are closely related to the manufacturing process, play a major role in the corrosion resistance of the rebar (Manna, 2009; Maslehuddin et al , 2002; Zaky et al , 2009; Zitrou et al , 2007). As is well known, the scale of hot‐rolled mild steel consists of oxide phases, including wüstite (FeO), magnetite/maghemite (Fe 3 O 4 /γ‐Fe 2 O 3 ) and hematite (α‐Fe 2 O 3 ) (Wei et al , 2010; Wei J. et al , 2011; Sun et al , 2003), and even fayalite (2FeO · SiO 2 ) (Burke and Higginson, 2000).…”