This document provides an overview of magnetic particle testing (MPT) for crack detection. It discusses the theory behind MPT, how it works to detect surface cracks in ferrous materials using magnetic fields and particles, basic MPT procedures for both wet and dry methods, how to interpret MPT results, advantages and limitations of the technique, examples of MPT equipment, competitors' products, and information on one company's MPT oil product called IPOL LTM 105 OIL. The document is intended to introduce MPT and its applications for crack detection.

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Content
 Market Overview
 Introduction of MPT
 Theory of MPT
 Basic Testing & Procedure
 Application
 MPI Interpretation
 Advantages & Limitations
 MPT Equipment
 OEM’s
 Competitor Products
 IPOL Product
 Major Customer
 Q & A
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Global Market Overview of Crack Detection Oil
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Introduction & Objective
• Detect voids in Ferrous
• Magnetic leakage identify
• Defect to attract particle
• Reveal with UV light
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Theory Behind Leakage
Magnetic flow line Magnetic Particle
Magnetic flow line
Crack
Flawless Specimen Cracked Specimen
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Basic of Magnetic Particle Testing
Interrupt the magnetic field
Specimen is magnetized
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Basic Procedure of MPT ( Magnaflux Particle Testing)
Pre-Cleaning
Electric flow-Specimen
Electromagnet
Electric Flow- Coil
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Application of Magnetic Media
Wet Method
Dry Method
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Dry Method for Crack Detection
Contaminated Workpiece Cleaning of Workpiece Applying Penetrant
Rinsing the Workpiece Applying Developer Inspecting Crack
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Wet Method for Crack Detection
Inspect for
indications
Apply the
magnetizing
force
Apply the
suspension
Prepare the
part surface
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Interpretation of MPI (Magnaflux Particle Inspection)
Crane Hook Gear Splined Shaft
Drive Shaft
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Lack of Fusion in SMAW ( Shielded Metal Arc Welding)
Visible, Dry Method
Indication
Indication
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Scope of Crack Detection Oil
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MPI – Advantages & Limitations
Advantages Limitations
Can detect surface crack. Cannot inspect crack on non-ferrous materials
Can inspect crack in irregular shapes easily. Special power requirements for large parts.
Flaw detectability under contamination. Coating removal for detection.
Fast method of inspection Limited subsurface discontinuity.
Low cost methods. Post cleaning and demagnetization
Portable method Proper alignment between magnetic flux and
component.
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Magnaflux testing Equipment
Central Conductor
Fixed Head
Movable Head
UV Light Coil
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Prods
Yoke
Suspension
Magnaflux testing Equipment
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OEMs
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Competitors Product Range
Manufacturer Product Name
Magnaflux (ITW Ltd) Magnaglo Carrier II
Pratap Texchem Pvt Ltd Lubeco Superflux II
Fuchs Vitrolis ACX
Houghton Rust Veto 303
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Characteristics Test Method Test Results
Appearance Visual Clear transparent
Viscosity cSt @ 40*C ASTM D 445 4.06
Density @ 15* C P:16 0.78
Flash Point COC* C P:69 116
Copper Corrosion @ 100* C ASTM D 130 1a
IPOL LTM 105 OIL
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Major Customer
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Thank You ..!
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