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AquaArmor corrosion control coatings provide outstanding protection for ferrous metals in severe environments, UV exposure and extreme exposure to salt, water, and acids.
The following is a basic description of the primary corrosion conditions where AquaArmor is effective.
Corrosion of ferrous metals i.e. Ductile Iron and Steel is primarily the result of four actions:
- Oxidation (Primarily Rust)
- Salt Water
Electromechanical (Galvanic)
- Acids
- Corrosion in Concrete
Oxidation (Primarily Rust)
Rust is the oxide that is formed by open-air oxidation of iron. The chemical composition of rust is mainly iron(III) oxide (Fe2O3), and under wet conditions may include iron(III) oxide-hydroxide (FeO(OH)). Rusting is the common term for corrosion of iron and its alloys, such as steel. Although oxidation of other metals is equivalent, these oxides are not commonly called rust.
As rust has higher volume than the originating mass of iron, its buildup may force adjanced parts apart - a phenomenon known as rust jacking
Salt Water
The corrosion of iron in sea water proceeds in a similar yet greatly accelerated manner because water generally becomes more corrosive as its salt content increases. Iron corrodes five times faster in sea water than in soil, and 10 times faster in sea water than in air
Electromechanical (Galvanic)
In electrochemical corrosion, a galvanic cell is created when two different metals, or different areas on the same metal, are coupled by means of an electrical or ion-conducting electrolyte. The result is an electrochemical reaction. In essence, electrochemical corrosion is reserved for those processes where a current flows between anodic and cathodic areas situated at different parts of a metallic surface or between two different metals of the same or different material. The electrochemical oxidation of iron results in the formation of ferrous ions as the initial product.
Acid Corrosion
AquaArmor is effective in resisting the following acids:
Corrosion in Concrete
Corrosion of steel embedded in concrete results in the formation of rust which has two to for times the volume of the original steel and non of it' good mechanical properties. Corrosion also produced pits or holes in the surface of reinforcing steel, reducing strength capacity as a result of the reduced cross sectional area.
Reinforced concrete uses steel to provide the tensile properties need in structural concrete. However when steel reinforcement corrodes, the formation of rust leads to loss of bond between the steel an concrete. If left unchecked the integrity of a structure can be affected due to the both the reduction in cross sectional are of the steel and also slippage along the surfaces of the steel to concrete interface.
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