Rust Prevention: How the Weather Contributes to Rusting

rust prevention

No matter where you look, rust is ugly, unsightly, and when it is spotted, it means that metal is being corroded and damaged. Rust can also pollute the soil and groundwater. If left unchecked, rust will permanently destroy metal. Wherever you can find metal - inside your home, in your garden, in or out of a building, or part of the infrastructure - rust and corrosion can be prevented.


To help you with rust prevention, we first need to understand the factors that cause rust and what speeds up its development.



Rust thrives more in a hot and dry environment rather than a climate that is wet or humid. Although the terms ‘rust’ and ‘corrosion’ is often used interchangeably, rust is the byproduct of the process of corrosion. Metal corrodes because it goes through a chemical reaction that involves water and oxygen. If the metal is always exposed to different elements such as rain, high humidity that condenses on the metal, and heat, these factors will start the process of corrosion. Metal always kept dry is less likely to rust.



High temperature due to the sun’s heat plays a big part in the process of corrosion. The hotter the temperature, the higher the rate of corrosion. Generally, there is more rusting in summer than in winter.


Winter Weather

Although more corrosion may occur during the hotter months, corrosion may also occur in winter. For instance, if the metal is exposed to large quantities of snow and ice, and is also exposed to large amounts of salt or other de-icing substances like those put down on roads, the combination of all these elements can increase the rate of rust formation.


Acid Rain

Rain, in general, can play havoc on metal. But acid rain is even worse and can speed up the acceleration of rust. Acid rain is caused by different factors, the most common being pollution from an unregulated industry that comes back to earth as rain. There are also natural factors that cause acid rain, but these are less common. Any metal that is exposed to acid rain will corrode and rust faster. Acid rain will accelerate rust faster if the pH level of water in rainfall is far below the normal level of 5.6.


Atmospheric Corrosion

Aside from rain in general, other meteorological conditions that bring moisture such as dew, condensation, or high relative humidity (RH) can contribute to accelerating corrosion if these wet conditions should happen to collect in crevices and pockets.


For better rust prevention, exposed metal to weather conditions may be coated with a protective membrane such as that provided by Unituff 452 (Seal’n’Peel). This product works well for all types of conventional metal. For stainless steel, Unituff OGS is specially made for this particular metal.


Keep up to date with protective measures against rust. Check out the Unituff OGS today.