How to Do Visible Magnetic Particle Inspections [Video]

  •  

Learn about the magnetic particle inspection method of nondestructive testing, including basic steps for NDT with dry, visible magnetic particles using an electromagnetic yoke

 

In this video Magnaflux’s Brian Batteiger goes through the common steps of magnetic particle inspection with dry, visible magnetic particles on ferrous parts as outlined in ASTM E1444: Standard Practice for Magnetic Particle Testing. The specific sequence of steps may vary depending on the method of particle application and magnetization technique.

  1. Surface preparation: It is important for the test surface to be clean, dry and free from any dirt, grease, scale, paint or other materials which might interfere with the inspection, Brian is using SKC-S solvent cleaner/remover.
     
  2. Magnetization set-up: The test part or area must be set-up to have the magnetizing current applied to it. This will be different for various applications, in the video Brian demonstrated how to test a weld using an electromagnetic yoke.
      
    • Magnetization method: There are different types of magnetic current, ways to apply current to a part and magnetic field direction, check the part procedure for the correct magnetization method. Here Brian uses an Y-1 AC yoke.
       
    • Amperage: Make sure to consult the part procedure for the correct amperage which will vary depending on the part, type of metal and type of defect needing to be found. 
       
    • Magnetic field strength: Check the magnetic field strength with a Pie GaugeHall Effect Meter, QQI, known defect or Magnetic Flux Indicator Strip.
  3. Apply magnetic current: For dry, continuous method the magnetic current is started before magnetic powder is applied and the magnetic current is terminated only after magentic particle application is complete.

  4. Apply magnetic particles: Brian demonstrates dry magnetic particle application, continuous method by apply the mag particles to the part while applying the current and gently removes the excess magnetic powder while the current is still being applied.

  5. Inspection: Evaluate the part under appropriate UV lighting conditions, inspect the part for any indications and take the appropriate steps to interpret and document any findings.

  6. Additional magnetization: Depending on the part and the process, additional magnetization may be required to find indications in different orientations on the part or test surface. In this case, repeat steps 2-5 for the additional magnetization. 

  7. Demagnetization: Using the appropriate magnetic current, field strength and direction, demagnetize the part after the final inspection is complete and use a Field Meter to check for any residual magnetism.
     
  8. Postcleaning: Parts are cleaned after inspection to remove any remaining magnetic particles.

 

Dry-Method Magnetic Particle Advantages

  • Effective at low temps
  • Effective at high temps
  • Easy removal, not as messy as wet-method
  • Good particle mobility with AC and HWDC
  • Equipment may be less expensive

 

Dry-Method Magnetic Powder Disadvantages

  • Not as sensitive as wet-method for very fine and shallow cracks
  • Difficult to use in overhead inspections
  • Hard to tell when/if complete coverage is achieved
  • Not good for high-volume
  • Difficult to adapt to any type of automatic system

 

Dry-Method Mag Particle Uses

  • Detecting large, course discontinuities
  • Locating surface and subsurface discontinuities
  • Large objects or for field inspections
  • With portable equipment
  • Finding relatively deep flaws with HW rectified current
  • Weld testing
  • Castings

 

Visit our Magnetic Particle Inspection section for additional information and education resources.

 

Just like all nondestructive testing methods, the results of a mag particle inspection are only reliable if the testing is performed accurately and consistently.

This is meant to provide a general overview of a typical MT / MPI process; all NDT testing must be performed in accordance with the prescribed specifications or test procedures.

Want to stay up on the latest NDT insights and articles from Magnaflux? Subscribe to Magnaflux updates get fresh news delivered to your inbox.

Please wait while we gather your results.

Related Blog Entries

Understanding Safety Data Sheets

Understanding Safety Data Sheets: Do You Know What’s in the Chemicals You Handle?

We highlight the 5 major sections to understand on a Safety Data Sheets (SDS) in accordance with US OHSHA Hazcom 2012 GHS regulations

Read More...

Use the ROI Calculator to learn how multi-directional magnetic particle equipment can save

Magnetic Wet Bench Saves $75,833 a Year with Improved Speed and Efficiency [Case Study]

Use the Universal WE ROI Calculator to learn how multi-directional magnetic particle equipment can save you time and money

Read More...

Magnetic Particle Equipment Demo

Multi-directional Mag Particle Inspection Equipment [Video]

Watch the versatile MD-Series multi-directional mag particle inspection equipment in action. Learn how this wet bench can help you save time and money.

Read More...

We explain why each Magnetic Particle Inspection accessory is needed to validate MPI systems

8 System Performance Tools for Magnetic Particle Inspection

In this article, we list and explain why each Magnetic Particle Inspection accessory is needed to validate the system performance of an inspection

Read More...

UV-A Intensity: What’s Special About 5,000 µW?

UV-A Intensity: What’s Special About 5,000 µW?

Most UV-A lamps on the market are set to provide 5,000 µW/cm2 at a distance of 15 in / 38 cm. What’s so special about those numbers?

Read More...

Breaking Down How to Use Magnetic Flux Indicators and QQIs

Breaking Down How to Use Magnetic Flux Indicators and QQIs

In this article, Magnetic Particle Inspection Flux Indicator Strips and Quantitative Quality Indicators (QQI) are defined and given a user manual approach to find artificial flaw standards

Read More...

Overview of Liquid Penetrant Inspection and Magnetic Particle Inspection Specifications

Overview of Liquid Penetrant Inspection and Magnetic Particle Inspection Specifications

Understanding ASTM and SAE/AMS specifications to select the corresponding Magnaflux product for Liquid Penetrant and Magnetic Particle Inspections

Read More...

Importance of Using Magnaflux Authorized Service Centers

Importance of Using Magnaflux Authorized Service Centers

Explaining the who, what, when, where, why, and how of Authorized Service Centers, and why they are best for NDT maintenance and repairs

Read More...

New Magnaflux Magnetic Particle Wet Bench for High Speed Inspections [Video]

New Magnaflux Magnetic Particle Wet Bench for High Speed Inspections [Video]

Universal WE is a multi-directional wet bench designed to meet the speed requirements of high volume production facilities.

Read More...

Differences of Using Multi-Directional and Uni-Directional [Case Study]

Differences of Using Multi-Directional and Uni-Directional [Case Study]

In this experiment, we compare the speed of a multi-directional magnetic particle wet bench to a traditional uni-directional method.

Read More...

Magnetic Field Safety Guidelines for Pacemakers

Magnetic Field Safety Guidelines for Pacemakers

This article reviews the limitations of operators with cardiac pacemaker’s exposure to magnetic particle inspection equipment.

Read More...

How to Calibrate Your MPI Equipment in 5 Steps

How to Calibrate Your MPI Equipment in 5 Steps

In this article, we will go over the five key factors to successfully calibrate your Magnetic Particle Equipment in reference to ASTM E1444, ASTM E3024, ISO 9934, or Nadcap AC7114/2

Read More...

A Primer on System Performance Checks for High Volume NDT Inspections

This article explores a few of the approaches most Magnetic Particle Inspectors practice to check their system performance at regular intervals

Read More...

NDT UV LED Lamps

Frequently Asked Questions About NDT UV LED Lamps

Frequently Asked Questions About NDT UV LED Lamps

Read More...

Customized Solutions for Unique Needs

Magnetic Particle Equipment – Customized Solutions for Unique Needs

In this article, we show two examples how Magnaflux can customize magnetic particle equipment

Read More...

The most common incorrect assumptions about magnetic particle inspection

10 Misunderstandings about Magnetic Particle Testing

This article discusses the most common incorrect assumptions about magnetic particle inspection and gives you some solutions to combat these misunderstandings

Read More...

A Primer on Magnetic Particle Inspection

A Primer on Magnetic Particle Inspection [SlideShare]

A 4-minute mag particle primer to help you understand why this simple, quick, and effective method is still widely used today.

Read More...

Magnaflux Database System for NDT Control

Database System for Mag Particle Wet Benches [Video]

Learn how this process-control and efficiency upgrade for mag particle testing helps NDT pros improve quality with less time.

Read More...

NDT Carrier Oil Fluid for Mag Particle Testing

Frequently Asked Questions About NDT Carrier Fluid

In this article, we explain what an NDT-approved carrier is and what sets it apart from commonly used, non-approved base oils

Read More...

Magnetic Particle Crack Comparison

How Brightness and Contrast Impact NDT Inspections

How perception and vision can have a significant impact on probability of detection in non-destructive testing inspections.

Read More...

Technique Management Challenges

How Integrated Techniques Can Ease the Pain of Part Variability

This article explores issues many magnetic particle inspection operators face when testing diverse parts that require specific standards and acceptance criteria in a world that does not accept mistakes

Read More...

Why carrier oil is a critical part of the MPI process

Importance of Using the Correct Oil for Magnetic Particle Inspection

In this article, we explain why carrier oil is a critical part of the MPI process and which characteristics to look for when choosing an NDT carrier fluid

Read More...

Magnaflux Semi-automated System

Magnetic Particle Equipment for OCTG Couplings [Video]

See how Magnaflux's semi-automated magnetic particle testing system simplifies Oil Country Tubular Good coupling inspection.

Read More...

Aerospace MRO NDT

Reducing Particle Loss During Mag Particle Testing [Case Study]

In this case study, we help an aerospace MRO customer resolve fluctuations in their magnetic particle concentration

Read More...

Carrier II SlideShare

Understanding Wet Method Magnetic Particle Testing Carrier II [SlideShare]

Learn about Magnaflux's NDT-approved petroleum base suspension vehicle for Wet Method Magnetic Particle Testing, and how it compares to competitors.

Read More...

Magnetic Particle Inspection Demo

5 Quick Tips for Mag Particle Testing [Infographic]

Some handy tips for beginners who are new to magnetic particle testing or NDT pros who want an easy reference guide.

Read More...

Understand the difference between magnetic particle inspection standards ASTM E709, ASTM E1444 and A

A Guide to ASTM E3024 Standard Practice for Magnetic Particle for General Industry

Understand the difference between magnetic particle inspection standards ASTM E709, ASTM E1444 and ASTM E3024

Read More...

Mobile Power Packs Demo

Adaptable Mobile Power Packs for Magnetic Particle Inspection [Video]

Learn how to use M-Series magnetizing equipment to perform Magnetic Particle Inspections on a variety of large, heavy parts.

Read More...

Magnetic Particle Inspection Demo

How to Do Fluorescent Mag Particle Inspections [Video]

Watch a demonstration of the magnetic particle inspection method according to ASTM E1444 with basic steps for NDT using fluorescent magnetic particles.

Read More...

How to Do Preventative Maintenance for Magnetic Particle Equipment

Read how regular upkeep on mag particle equipment is critical for non-destructive testing to safe guard inspections & reduce downtime.

Read More...

Magnetic Particle Inspection Demo

How to Do Visible Magnetic Particle Inspections [Video]

See an overview of visible, dry-method magnetic particle inspection method according to ASTM E1444.

Read More...

Mag Particle Settling Volume Test

Mag Particle Carrier Settling Test Performance [Video]

See how three common magnetic particle testing carriers perform in a standard ASTM E1444 settling volume test.

Read More...

Multidirectional Magnetization for Magnetic Particle Inspection

Learn about multi-directional magnetization applications and how mag particle inspections can benefit from multi-vector magnetization.

Read More...

Subscribe to Magnaflux News:

Magnaflux

155 Harlem Avenue
Glenview, IL 60025, USA
Telephone: +1 847-657-5300
Fax: +1 847-657-5388
Contact Magnaflux Customer Service

Select Your Country North America Mexico Brazil China Europe Russia India New Zealand, Australia, Japan, Southeast Asia
© 2018 Magnaflux - all rights reserved.
top

We have placed cookies on your computer to give you the best possible experience with our website. These cookies are also used to ensure we show you advertising that is relevant to you. If you continue without changing your settings, you are agreeing to our use of cookies to improve your user experience. You can click the cookie settings link on our website to change your cookie settings at any time.