Chavanich Company Limited

Magnetic particle Inspection (MPI) is a nondestructive testing process where a magnetic field is used for detecting surface, and shallow subsurface, discontinuities in ferromagnetic materials. Examples of ferromagnetic materials include iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part. The piece can be magnetized by direct or indirect magnetization. Direct magnetization occurs when the electric current is passed through the test object and a magnetic field is formed in the material. Indirect magnetization occurs when no electric current is passed through the test object, but a magnetic field is applied from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current, which may be either alternating current (AC) or some form of direct current (DC) (rectified AC).

Visible (Dry)

ZChek 9D Red

Colored Non-fluorescent Magnetic Particles

ZChek 9D Red is a Brilliant Red coloured free flowing magnetic particle powder used in Dry Method Magnetic Particle Inspection. The Brilliancy of the colour will provide perfect contrast on most of the ferromagnetic materials and its alloys. This dry method Magnetic Particle inspection is performed under normal visible light which makes the colour of the powder very clear. 9D Red is formulated with selected particle size and shape, to locate surface and near surface discontinuities in ferrous materials.

Visible (Wet)

ZChek WP

White Contrast Paint

ZChek-WP is a high-performance solvent-based white contrast paint used for providing an excellent background while performing Magnetic Particle Inspection using Non-Fluorescent Black Powder, recommended to use with ZChek-9E Black.

ZChek 9E Black

Oil-Based Visible Magnetic Particle Suspension

ZChek-9E Black is a high performance Non-Fluorescent Black Magnetic Particle Powder suspended in the ZChek 801 Cart oil. ZChek 9E Black is used to detect Surface & near surface discontinuities in Ferro magnetic materials and its alloys. Will give best results when used in combination with Zchek WP white contrast paint.

ZChek 9 Black

Oil-Based Visible Magnetic Particle Suspension

ZChek 9 is a black dry powder formulated to be used in wet method Magnetic Particle Inspection to detect discontinuities on light coloured surfaces for optimum colour contrast. Generally used for Non Fluorescent Magnetic Particle inspection in Fabrication , castings & Bright Bars. 9 black may be suspended in either Z801 cart oil or in water. When water as a vehicle use conditioning agents ZChek WA9.

ZChek NF Red

Colored Non-fluorescent Magnetic Particles

ZChek NF Red is red dry powder, formulated to be used in wet method Magnetic Particle Inspection to detect discontinuities on light coloured surfaces for optimum colour contrast. NF Red may be suspended in either Z801 cart oil or in water. When water is used as vehicle, use conditioning agent – ZChek WA9

ZChek WA-9

Water Conditioner

ZChek WA-9 is a water conditioner used as wetting agent in magnetic particle inspection when water is used as a carrier. WA9 can be used with either ZChek F9 or ZChek F18 at recommended concentration to get desired results while using water as a carrier medium.

WA9 has wetting agents, corrosion inhibitors and antifoaming agents which enhances in wet method magnetic particle testing.

Visible (Wet)

ZChek F18

Wet Method Fluorescent Magnetic Particles

ZChek F18 is a Dark Brown Colored Magnetic Particle Powder designed to be fluorescing Bright Yellow- Green under UV Light. ZChek F18 consists of ultra-high sensitivity particles for detection of very fine discontinuities in Ferromagnetic materials. Using the state-of-the-art encapsulation technology, ZChek F18 is manufactured to exhibit excellent properties (High permeability, low retentivity, high mobility and optimum particle distribution) required for high sensitive fluorescent MPI process

ZChek F18W

Water based Fluorescent Magnetic Particle

ZChek F18W is a Brown Colored water based Magnetic Particle Powder designed to be fluorescing Bright Yellow- Green under UV Light. ZChek F18W consists of ultra-high sensitivity particles for detection of very fine discontinuities in Ferromagnetic materials. Using the state-of-the-art encapsulation technology, ZChek F18W is manufactured to exhibit excellent properties (High permeability, low retentivity, high mobility and optimum particle distribution) required for high sensitive fluorescent MPI process. Special additives in F18W provide excellent particle mobility in water medium and avoid flash rusting of parts.

ZChek F9

Fluorescent Magnetic Particles

ZChek F9 is a Green Colored Magnetic Particle Powder designed to be fluorescing Bright – Green under UV Light. ZChek F9 consists of high sensitivity particles for detection of very fine, medium, and shallow discontinuities in Ferromagnetic materials. Using the state-of-the-art encapsulation technology, ZChek F9 is manufactured to exhibit excellent properties (High permeability, low retentivity, high mobility and optimum particle distribution) required for high sensitive fluorescent MPI process.

ZChek F9W

Wet Method Fluorescent Magnetic Particles

ZChek F9W is a Green Colored water based Magnetic Particle Powder designed to be fluorescing Bright Green under UV Light. ZChek F9W consists of high sensitivity particles for detection of very fine discontinuities in Ferromagnetic materials. Using the state-of-the-art encapsulation technology, ZChek F9W is manufactured to exhibit excellent properties (High permeability, low retentivity, high mobility and optimum particle distribution) required for high sensitive fluorescent MPI process. Special additives in F9W provide excellent particle mobility in water medium and avoid flash rusting of parts.

ZChek FB

Oil-Based Fluorescent Magnetic Particle Suspension

ZChek FB is a fluorescent fluid packaged in the aerosol can. The product is designed to be ultra-highly sensitive particle which is used to detect very fine discontinuities in any ferromagnetic materials generally used in aerospace/aviation, forgings, steel bars, billets, automobile components, machined and heat-treated components or other engineering applications using wet method fluorescent magnetic particle inspection.

ZChek Z801

Carrier oil/ Cart oil

ZChek 801 is a specially formulated for carrying Magnetic particles in wet method. It is blended with highly refined additives which ensure good suspension of Magnetic particles in the vehicle and eliminate the natural fluorescence of the oil. It has a flash point of over 93 degree C- which makes it safe to use.

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