Premature corrosion of a substrate is usually due to a coating failure. A major cause is the presence of flaws in the finished coating. Collectively referred to as porosity, the main types of flaws are:
Runs & Sags: Coatings move under gravity leaving a thin dry film.
Cissing: When a coating does not re-flow to cover the voids generated by air bubbles being released from the surface of a coating.
Cratering: If the substrate is wet or the coating has poor flow characteristics, voids are created in the coating.
Pinholes: Caused by air entrapment which is then released from the surface, or by the entrapment of particulates (dust, sand etc.) which do not stay in place.
Over Coating: If too much coating is applied, as it cures internal stresses of the coating can cause it to crack.
Under Coating: Uncoated areas, or where the coating flows away from edges or corners of a substrate or welds. Insufficient coating over a rough surface profile may also leave the peaks of the profile exposed.
- Surface Cleanliness
- Climate, Dewpoint & Relative Humidity
- Dry Film Thickness
- Digital Coating Thickness Gauges
- Mechanical Coating Thickness Gauges
- Destructive Coating Thickness Gauges
- Calibration
- ElcoMaster® Software
- Abrasive & Blast Inspection
- Surface Condition
- Surface Profile
- Surface Roughness
- Moisture Measurement
- Oven Temperature Profile
- Wet Film & Powder Thickness
- Adhesion Testers
- Material Thickness
- Pinhole & Porosity
- Wet Sponge Pinhole Detection
- High Voltage Porosity Detection
- High Voltage Accessories
- UV Pinhole Detection
- ElcoPatch™ Holiday Repair Kit
- ElcoPatch™ Holiday Repair Kit
- Inspection Accessories
- Inspection Kits
- Gloss & Reflectance
- Colour Management
- Fineness of Grind/Dispersion
- Density & Specific Gravity
- Viscosity & Flow Measurement
- Flash Point
- Film Application & Test Charts
- Drying Time & Permeability
- Washability & Abrasion
- Hardness & Scratch Resistance
- Elasticity, Bend & Impact Testers
- ElcoMaster® Software
- Inspection Kits
- Abrasive & Blast Inspection
- Surface Condition
- Surface Profile
- Surface Cleanliness
- Climate, Dewpoint & Relative Humidity
- Moisture Measurement
- Wet Film Thickness
- Dry Film Thickness
- Digital Coating Thickness Gauges
- Mechanical Coating Thickness Gauges
- Destructive Coating Thickness Gauges
- Calibration
- Material Thickness
- Adhesion Testers
- Pinhole & Porosity
- Wet Sponge Pinhole Detection
- High Voltage Porosity Detection
- High Voltage Accessories
- UV Pinhole Detection
- ElcoPatch™ Holiday Repair Kit
- ElcoPatch™ Holiday Repair Kit
- Inspection Accessories
- Blast Equipment
- ElcoMaster® Software
- Inspection Kits
- Surface Cleanliness
- Surface Roughness
- Wet Film & Powder Thickness
- Dry Film Thickness
- Climate, Dewpoint & Relative Humidity
- Moisture Measurement
- Oven Temperature Profile
- Adhesion Testers
- Gloss & Reflectance
- Colour Management
- Pinhole & Porosity
- Inspection Accessories
Premature corrosion of a substrate is usually due to a coating failure. A major cause is the presence of flaws in the finished coating. Collectively referred to as porosity, the main types of flaws are:
Runs & Sags: Coatings move under gravity leaving a thin dry film.
Cissing: When a coating does not re-flow to cover the voids generated by air bubbles being released from the surface of a coating.
Cratering: If the substrate is wet or the coating has poor flow characteristics, voids are created in the coating.
Pinholes: Caused by air entrapment which is then released from the surface, or by the entrapment of particulates (dust, sand etc.) which do not stay in place.
Over Coating: If too much coating is applied, as it cures internal stresses of the coating can cause it to crack.
Under Coating: Uncoated areas, or where the coating flows away from edges or corners of a substrate or welds. Insufficient coating over a rough surface profile may also leave the peaks of the profile exposed.