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Magnetic Particle Testing Lecture Guide l CONTENTS
Wet Fluorescent Method ...............................................................76
Test Variables ......................................................................76
Bath Strength ...................................................................76
Volume Loss ....................................................................76
Bath Replenishment .............................................................77
Suspension Preparation .............................................................77
Suspension Application .............................................................77
Dry Powder Liquid Concentrate ...................................................77
Wet Paste Concentrate ..........................................................77
Water Baths ...........................................................................77
Water Bath Safety ..................................................................78
Water Bath Issues ...................................................................78
Water Bath Concentration ...........................................................78
Settling Test ........................................................................78
Wet Magnetic Particles for Yoke Magnetization .....................................78
Fluorescent Background Check ......................................................78
Oil-Based Media Contamination Check ...............................................79
Fluorescent Test Materials ...............................................................79
Maintenance ......................................................................79
Surface Preparation for Wet Fluorescent Method .......................................79
Fluorescent Bath Test Variables .......................................................79
Ultraviolet Radiation ...................................................................79
Generation of Ultraviolet Radiation ...................................................79
Ultraviolet Lamp Fixtures .............................................................80
Sources ...........................................................................80
Carbon Arc Systems ............................................................80
Low-Pressure Fluorescent Bulbs ....................................................80
High-Pressure Arc Bulbs ..........................................................80
Lesson 12 Quiz ........................................................................81
Lesson 13: Types of Discontinuities .......................................................83
Introduction ..........................................................................83
Effects of Discontinuities on Materials ..................................................83
Inherent Discontinuities .................................................................83
Cold Shuts ........................................................................83
Pipe ..............................................................................84
Hot Tears ..........................................................................84
Blowholes and Porosity ..............................................................84
Nonmetallic Inclusions ..............................................................84
Segregation .......................................................................84
Primary Processing Discontinuities ........................................................85
Seams ............................................................................85
Laminations .......................................................................85
Stringers ...........................................................................85
Magnetic Particle Testing Lecture Guide l CONTENTS
Wet Fluorescent Method ...............................................................76
Test Variables ......................................................................76
Bath Strength ...................................................................76
Volume Loss ....................................................................76
Bath Replenishment .............................................................77
Suspension Preparation .............................................................77
Suspension Application .............................................................77
Dry Powder Liquid Concentrate ...................................................77
Wet Paste Concentrate ..........................................................77
Water Baths ...........................................................................77
Water Bath Safety ..................................................................78
Water Bath Issues ...................................................................78
Water Bath Concentration ...........................................................78
Settling Test ........................................................................78
Wet Magnetic Particles for Yoke Magnetization .....................................78
Fluorescent Background Check ......................................................78
Oil-Based Media Contamination Check ...............................................79
Fluorescent Test Materials ...............................................................79
Maintenance ......................................................................79
Surface Preparation for Wet Fluorescent Method .......................................79
Fluorescent Bath Test Variables .......................................................79
Ultraviolet Radiation ...................................................................79
Generation of Ultraviolet Radiation ...................................................79
Ultraviolet Lamp Fixtures .............................................................80
Sources ...........................................................................80
Carbon Arc Systems ............................................................80
Low-Pressure Fluorescent Bulbs ....................................................80
High-Pressure Arc Bulbs ..........................................................80
Lesson 12 Quiz ........................................................................81
Lesson 13: Types of Discontinuities .......................................................83
Introduction ..........................................................................83
Effects of Discontinuities on Materials ..................................................83
Inherent Discontinuities .................................................................83
Cold Shuts ........................................................................83
Pipe ..............................................................................84
Hot Tears ..........................................................................84
Blowholes and Porosity ..............................................................84
Nonmetallic Inclusions ..............................................................84
Segregation .......................................................................84
Primary Processing Discontinuities ........................................................85
Seams ............................................................................85
Laminations .......................................................................85
Stringers ...........................................................................85