Corrosion and Prevention went Online for the first Time in 2020, Day One of The Conference focused on Advances in Understanding Corrosion Mechanisms and Asset Failure and featured the following presentations: A novel approach to shallow water corrosion modelling: use of shipwreck material from HMS Sirius (1790) – Ian. D MacLeod. Initial corrosion behaviour of spheroidal graphite cast iron and rust evaluation in atmospheric environment -Ichiro Dote. Stress corrosion cracking of cable bolts – Judy Turnbull. Examination of a single column pantograph disconnector failure – Roger Costanzi. Corrosion resistance and deterioration behaviour of overlapping layer between thermal spray coating and heavy duty paint coating – Muye Yang