In-situ Zn-Al layered double hydroxide conversion coatings prepared on galvanized steels by a two-step electrochemical method

• Published in: Corrosion science Vol. 233; p. 112057
• Main Authors: Xu, Teng, Yu, Lei, Hu, Ji-Ming
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2024
• Subjects: Coating system; Corrosion protection; Layered double hydroxide; Pretreatment layer; Two-step electrochemical method; Pretreatment layer; Coating system; Corrosion protection; Layered double hydroxide; Two-step electrochemical method

Zn-Al layered double hydroxide (LDH) pretreatment layer was prepared by a novel two-step electrochemical method on galvanized steel surface from a precursor solution containing Al3+-only. In the first step, anodic currents are applied to Zn deposit to produce Zn2+ in solution near the substrate surf...