MechChem Africa

Rust-Anode® and Rust-Anode Primers from BMG are made of ecologically green materials, have low VOCs and excellent resistance to corrosive environments. Marc Gravett, the business unit manager for seals at BMG, says their applications include cement factories, paper mills, pipelines, bridges and electricity pylons.

BMG Rust Anode cold galvanisation full rust prevention before and after applicationBMG’s extensive range of sealing products includes Rust-Anode, a cold galvanisation system designed for rust prevention in diverse industries, particularly those with corrosive environments.

“Rust-Anode – a single component, cold zinc-rich coating that protects steel surfaces electro-chemically – is vastly different from anti-corrosion paints in terms of composition of the material and its protection methods,” says Marc Gravett, business unit manager for seals at BMG. “Unlike conventional anti-rust paints, which eventually decompose and crack, Rust-Anode prevents rust formation and inhibits the spreading of pre-existing rust.

“Rust-Anode is preferred to the hot-dip galvanisation process for steel constructions in light profiles or thin plates because the hot-dip bath can deform light structures,” adds Gravett.

Rust-Anode and Rust-Anode Primer, with high resistance to corrosion, abrasion and impact, can be used as a primer or as a duplex system with a compatible topcoat. This zinc grey material with a matt finish is applied directly onto a clean or rusted steel surface with a brush, roller, or any paint spraying technique.

A layer of iron hydroxide is formed between the Rust-Anode and the steel surface, acting as an oxidation inhibitor to prevent rust formation.

This ready-for-use product provides cathodic protection identical to hot dip galvanising, where the lifetime expectation is between ten and 50 years. The application of a compatible topcoat over Rust-Anode can increase this service life by approximately 2.5 times.

Rust-Anode, with scratch protection up to 4.0 mm deep, can be applied on top of a previous layer of this material and can also recharge the cathodic protection of old and worn hot-dip galvanisation, without having to dismantle the structure.

There is no requirement for chemical processes for surface preparation prior to application, but the steel should be brushed clean and contamination-free.

The Rust-Anode layer, with high plasticity, forms a perfect adhesion with the steel surface and follows the dilation and deformations of the basic metal, without cracking or peeling.

Rust-Anode and Rust-Anode Primers are non-toxic and non-flammable when dry. These ecologically green materials, with low VOCs, have excellent resistance to corrosive marine environments and are not affected by UV. The coatings can be applied in a Ph atmosphere range from 5.5 to 12.5 for resistance to acids and alkaline compounds. Other applications include cement factories, paper mills, the railways and military, pipelines, bridges and electricity pylons.

BMG supports this range with a technical advisory and back up service across sub- Saharan Africa.

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