Neocol B Black Magnetic Ink

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Description

Johnson & Allen Neocol B

Johnson & Allen Neocol B is a high grade Black Magnetic Ink used in the Magnetic Particle Inspection process. It is available in both aerosols and bulk. The ink is used in conjunction with suitable magnetising equipment to locate fine surface and slightly subsurface discontinuities in ferrous materials. Typical defects found include shrink cracks, welding defects, grinding cracks, quenching cracks and fatigue cracks. Neocol B gives clear black indications when viewed in daylight.

Neocol B is a highly sensitive oil-based product for non-fluorescent (visible) wet method magnetic particle testing to locate fine and medium discontinuities on finished parts. It has a high flash point with good particle mobility, it uses the highest grade of particles, selected for their response to very low magnetic field strengths and also low coercivity.

Benefits

Maximise indication detection

• Heavy buildup of highly magnetic particles around all leakage fields make for heavy-contrast indications, especially when used with NPT16 (White Contrast Paint)

Convenient to use

• Inspect in all conditions without the need for darkness or UV lights
• The visible particles come in a convenient, aerosol format to be easily carried and used in the field

Wide application versatility

• Inspect a wide range of components without fear of corrosion or specification non-conformance

Features

• Clear indications under visible light
• Heavy particle build-up
• Great particle mobility
• Protects parts and equipment against corrosion
• Broad spray pattern provides even surface coverage over large areas
• Small particle size

Specification compliance

• ASTM E709
• ASTM E1444
• ISO 9934

Instructions for use

Use Neocol B with appropriate magnetisation procedure and equipment. For best results, all components, parts, or areas to be tested should be clean and dry prior to testing to provide an optimal test surface and reduce particle suspension contamination.

1. Use in a well ventilated area
2. For best results, apply the white contrast paint (the manufacturer recommendation is NPT16) before the Neocol B to improve contrast and inspection sensitivity
3. Shake aerosol can well before use and occasionally during application to ensure suspension uniformity and concentration
4. Hold the can 20 to 30cm from the area to be tested
5. Using the continuous or residual application method, spray particle suspension over the test area until it is completely covered
6. Inspect under visible light

To verify particle concentration, perform a sensitivity check using a known test standard prior to inspection

Defect examples:

• Welds
• Pressure vessels
• Structures
• Pipes
• Castings
• Forgings

Specifications

Properties
Appearance	Oily liquid and fine particle solution
Colour in visible light	Black
White Light	>500 Lux
Odour	Odourless
Flash point	100°C
Use recommendations
NDT Method	Magnetic Particle Testing, Nonfluorescent / Visible, Wet Method
Suspension Vehicle	Isoparaffin
Propellant	Carbon Dioxide
Required Equipment	Magnetising device, UV light source
Temperature Range*	-5 to 50°C
Settling Volume
Coverage
Accompanied by	NPT16

 

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Informations complémentaires

Manufacturer	Johnson and Allen
Package Size	Aérosol 400ml, Cas des aérosols 10×400ml, Bulk 5L