Mechanism of corrosion promotion at the interface (root)

basic information

■□■Mechanism■□■ Due to the combined effects of the factors below, the base of the metal column, that is, the ground level, becomes a harsher corrosion environment compared to the general area, which can induce various corrosion incidents. 【Promoting Factors】 ■ Dust, debris, and sand tend to accumulate, making capillary condensation more likely. ■ Rainwater and condensation accumulate along the pole. ■ Dust and sand can easily damage coatings and other protective layers. ■ Dogs urinate in the same spot during walks for marking, and urine has strong corrosive properties. ■ When wind or vibrations apply force to the iron column, concentrated stress occurs at the ground level, resulting in increased chemical activity of the metal (mechanochemical action), making it more susceptible to corrosion. ■ Repeated stress from wind and vibrations at the base of the iron column can lead to metal fatigue (corrosion fatigue). ■ Structurally, macro-cells can form. - A potential difference arises between the passivated iron column in the concrete and the area directly above it, leading to corrosion. ■ For more details, please contact us.

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Applications/Examples of results

Steel supports such as lighting fixtures, road signs, and handrails are exposed to a harsh corrosive environment at the base, which is the boundary with the ground, leading to rapid rust progression. In the worst case, the supports may break and collapse.