Simulation and Experimental Validation of Bimetallic Corrosion Between Galvanized Bolt and Mild Steel Plate: Effect of the Bolt Configuration

• Published in: JOM (1989) Vol. 76; no. 1; pp. 209 - 221
• Main Authors: Kamble, Prafull A., Deshpande, Pravin P., Vagge, Shashikant T.
• Format: Journal Article
• Language: English
• Published: New York Springer US 2024; Springer Nature B.V
• Subjects: Aluminum; Bimetals; Bolted joints; Boundary conditions; Buffer solutions; Carbon steel; Chemistry/Food Science; Configurations; Corrosion; Corrosion effects; Diameters; Earth Sciences; Electrolytes; Engineering; Environment; Finite element analysis; Galvanic corrosion; Galvanized steel; Galvanized steels; Galvanizing; Low carbon steels; Magnesium; Physics; Simulation; Simulation models; Software; Steel plates; Surface Engineering for Improved Corrosion or Wear Resistance; Ultrasonic methods
• ISSN: 1047-4838; 1543-1851
• DOI: 10.1007/s11837-023-06257-9

The effect of the bolt configuration (square, hexagonal, and round) and pitch circle diameter on the extent of galvanic corrosion between a galvanized steel M14 bolt and a mild steel plate was studied in neutral buffer solution by numerical simulation, and the results were validated using the ultrasonic method. The galvanic couple potential
E
CG
values obtained in the polarization were in good agreement with those obtained by modeling and simulation. Maximum and minimum metal dissolution was noted at the joint interface and away from the joint in all the bolted joints. The round galvanized M14 steel bolt exhibited a minimum thickness loss of ~ 0.49 mm if the pitch circle diameter was 70 mm. The metal loss values obtained by simulation were in close agreement with the ultrasonic measurements. The simulation model can be used to identify corrosion-prone areas in the bolted joint assembly.