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Active corrosion protection

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Active corrosion protection

Active corrosion protection describes all protective treatments of metallic surfaces that have an active corrosion-inhibiting effect.

 

A distinction is made between two types of active corrosion protection. The first possibility is the use of so-called corrosion inhibitors. These neutralise the harmful effect of corrosion-promoting media by chemical bonding. For example, hydrochloric acid and hydrogen sulphide corrosion can be prevented by the targeted addition of these "destimulants". Iron dissolution and hydrogen embrittlement during de-rusting and descaling of structural steels with diluted acids can also be prevented.

 

The second approach is known as cathodic corrosion protection (CCP) and is mainly used where metals come into contact with corrosive media such as water. Active corrosion protection is produced by zinc-containing coatings and zinc alloys (aluminium, nickel, magnesium). The principle: In the event of a corrosion attack, the zinc is oxidised while the underlying iron component is protected. The zinc sacrifices itself, which is why we speak of a "sacrificial anode". Due to its electrical conductivity, zinc plating also has a certain "remote effect" and can also protect distant areas of the component. Oxidation produces white rust until the zinc is used up. The zinc flake coating picks up this mechanism and transfers the principle to a paintable system.

Glossary

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Overspray-Test
Corrosion protection
Corrosion
Sacrificial anode
Local element
Rust
Surface protection
Burnishing
Hot-dip galvanising
Flame spraying
Galvanic coating
Conversion layer
Sherardising
Substrate
Colouring
Dry-film coat thickness
Fastening properties
Gloss level
Artificial weathering test
Weathering
Test procedures
Surface properties
Chemical resistance
Mechanical resistance
Flexibility
Natural weathering test
Physical properties
Passiveness, passive state
Protection, galvanic
Protection, temporary
Scale
Chromate Coating
Passivation coating
Self-passivation
Topcoat
Rack coating
Bulk process
Partial production lot
Drum coating
Erichsen ball recess
Coating thickness, total
Coating thickness, local
Coating thickness, reference
Delamination
Coating weight
Dry to the touch
Reference surface
Ductility
Spray coating
Sealing
Electroplated coating
Specific surface
Passive corrosion protection
Inorganic protective coatings
Organic protective coatings
Active corrosion protection
Forms of corrosion
Types of corrosion
Surface corrosion
Shallow pitting corrosion
Pitting corrosion
Contact corrosion
Bimetallic corrosion
Stress corrosion cracking
Hydrogen induced cracking
ISO 9001
Dip-Draw
Electro-dip painting (ETL)
Electrostatic powder spraying (EPS)
Phosphating
ISO 14001
Trueness of gauge
Dip-Spin
Coefficient of friction
Setting behaviour
Fastening and assembly
Kesternich test
Material effectiveness
Environmental management
Quality management
EMAS
Magnetic induction measurement
Engulfing
Scaling protection
Powder coating
Coil coating
X-ray fluorescence analysis
Beta backscatter method
Mandrel bend test
Eddy current method (phase sensitive)
Eddy current method (amplitude sensitive)
Turnover
Corrosion College
Powder sintering process
Zinc flake coatings
X-Ray
Dip coating process
Stone impact test
Process stages of KTL-seperation
Adhesion
Corrosion testing atmospheres conducive corrosion
Coat thickness and coat thickness measurement
Adhesion test according to DIN EN ISO 10683
Cross-cut test for adhesion
Thread tolerance
Pressure water jetting test
Fertiliser resistance
Anodic dip coating (ADC)
Cathodic dip coating (CDC)

Technical terms can not always be avoided. As corrosion experts, we not only want to give you comprehensive advice, we are also interested in making you a corrosion expert yourself.

The variety around the topic of corrosion and corrosion protection is also in our glossary at home: explanations from A as in Adhesion to T as in Thread tolerance. Have fun clicking through!