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Corrosion of metallic items can be either a chemical or electro-chemical process, triggered and boosted by a mixture of oxygen and dampness. But corrosion will only take place where specific corrosive substances are present. Packaging experts know that such corrosive substances can come into play in a great many ways and that the relevant operating corrosion protection measures must be upheld.
Traces of sweat from a packer's fingertips will not be immediately visible. Avoid touching metal parts susceptible to rust with your naked hand at all times. It is advisable to use either a cloth or, ideally, rubber gloves.

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Corrosion substances can occur in:
Air: plus dampness oxygen; industrial emissions; SO2, NOx


Water: salt water, chlorinated drinking water, etc.

Acids: caustics, welding and degreasing materials, acids contained inside crate wood and electroplating baths stored near the packaging department, etc.

Dust: and dirt attract dampness and bind corrosive substances


Other: hardened oils and greases bind dampness, sweat from hands contains chlorides, sulphates and phosphates such as lactic, uric and fatty acids

At all times, atmospheric air contains a certain amount of water in the form of an invisible water vapour. The exact quantity of water vapour in the air depends essentially on local and meteorological conditions, although a maximum threshold does exist, measured in g/m². Once this maximum amount has been reached, the air is referred to as "saturated" with damp and the rate of relative humidity is 100%.

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Hermann Nawrot AG • Lamsfuß 11 • D-51688 Wipperfürth • Tel: ++49 (0) 22 68 / 91 37-0 • E-Mail: mail@nawrot.de