Met-L-Chek — E-57 Lipophilic Emulsifier

Method B Lipophilic Emulsifier for Post-Emulsifiable Liquid Penetrant Inspection, 5 gal / 18.9 L
SKU: 29045-0005

Overview

Met-L-Chek E-57 is a lipophilic emulsifier designed for Method B post-emulsifiable liquid penetrant inspection. It is used after the penetrant dwell period to make excess oil-based penetrant on the component surface removable with water.

Unlike water-washable penetrants, Method B post-emulsifiable penetrants require a separate emulsification step. E-57 interacts with the excess penetrant on the surface, allowing it to be removed during the subsequent controlled water rinse while penetrant retained inside surface-breaking discontinuities remains available for development and inspection.

The 5-gallon / 18.9 L bulk container is well suited for immersion tanks, dedicated penetrant-processing stations, aerospace inspection departments, manufacturing facilities, maintenance operations, and other NDT environments using Method B penetrant systems.

What's Included

Note: Penetrant, developer, cleaner, immersion tank, rinse equipment, timers, UV-A equipment, and other inspection accessories are not included unless specified separately.

Box Dimensions & Shipping Weight (Estimated)

Actual dimensions and weight may vary depending on the container and protective packaging.

Key Specifications

Method B Inspection Sequence

Precise dwell, emulsification, rinse, drying, and development times should follow the approved written procedure.

Performance Features

Method B Lipophilic Emulsification
Designed specifically for post-emulsifiable penetrant systems using the Method B removal process.

Controlled Surface Penetrant Removal
Helps make excess penetrant on the component surface water removable while preserving penetrant retained in discontinuities when process times are properly controlled.

Ready-to-Use Formulation
Designed for direct use without routine dilution, simplifying Method B process control.

Suitable for Immersion Processing
Well suited for dedicated emulsifier tanks and production penetrant inspection lines.

Bulk 5-Gallon Supply
Provides a practical quantity for inspection departments performing regular Method B penetrant testing.

Supports High-Sensitivity PT Workflows
Method B processing is commonly selected where careful penetrant-removal control is required.

Lipophilic Emulsifier Function

E-57 works by interacting directly with the excess penetrant remaining on the inspection surface.

During the emulsification step:

• The emulsifier contacts the surface penetrant

• The penetrant and emulsifier begin to form a water-removable mixture

• Emulsification progresses inward from the exposed penetrant surface

• The process is stopped after the specified contact time

• Controlled water rinsing removes the emulsified surface penetrant

• Penetrant trapped inside surface-breaking discontinuities remains available to form indications

Because emulsification continues as long as contact is maintained, process timing is critical.

Method B Advantages

Method B post-emulsifiable penetrant systems can provide several advantages for suitable inspection programs:

• Controlled removal of excess penetrant

• Reduced risk of excessive background when properly processed

• Suitable for high-sensitivity penetrant systems

• Useful for production inspection lines

• Supports repeatable process control

• Allows penetrant and removal stages to be managed separately

• Suitable for demanding aerospace and manufacturing inspection programs

• Can provide excellent indication definition when properly applied

User-Friendly Design

• Ready-to-use formulation

• No routine dilution required

• Suitable for bulk immersion applications

• Can be integrated into established Method B processing lines

• Supports repeatable emulsification procedures

• Five-gallon container is practical for tank replenishment

• Suitable for dedicated inspection stations

• Can be transferred using compatible chemical-handling equipment

Built for Industrial Inspection Environments

• Designed for professional liquid penetrant testing

• Suitable for manufacturing and aerospace QA/QC

• Practical for production inspection lines

• Supports inspection of complex manufactured components

• Suitable for castings, forgings, machined parts, and other nonporous components

• Can be used in dedicated penetrant-processing tanks

• Bulk format supports regular production use

• Intended for controlled Method B inspection procedures

Application Guidelines

Before Emulsification

• Clean and dry the component thoroughly

• Apply an approved post-emulsifiable penetrant

• Allow the specified penetrant dwell time

• Drain excess penetrant where required

• Do not water-rinse the penetrant before applying the lipophilic emulsifier unless specifically permitted by the procedure

Emulsifier Application

E-57 may be applied according to the approved process, typically by:

• Immersion

• Controlled flow-on application

• Other approved Method B application techniques

Maintain complete and uniform contact with the required inspection surface.

Emulsification Time

Emulsification time is one of the most critical variables in Method B penetrant testing.

If the time is too short:

• Excess background penetrant may remain

• Rinsing may be difficult

• Inspection sensitivity may be affected by excessive background

If the time is too long:

• Penetrant may be removed from shallow discontinuities

• Relevant indications may become weaker

• Inspection sensitivity may be reduced

Use the emulsification time specified by the approved written procedure and maintain consistent process timing between components.

Water Rinsing

After the specified emulsification period:

• Begin water rinsing promptly

• Maintain the required water pressure

• Maintain the specified water temperature

• Direct the rinse to remove emulsified surface penetrant

• Avoid excessive rinse duration

• Monitor the component for adequate background removal

• Stop rinsing when the required surface condition is achieved

• Dry the component as required before developer application

Water-rinse parameters should be controlled according to the inspection procedure.

Compatibility

Compatible with:

• Approved post-emulsifiable penetrants

• Method B liquid penetrant inspection systems

• Compatible fluorescent penetrant systems

• Approved developers

• UV-A inspection equipment when used with fluorescent penetrants

• Suitable penetrant-processing tanks

• Compatible pumps and transfer equipment

• Rinse stations

• Drying ovens or drying equipment when applicable

• Suitable nonporous metallic materials

The penetrant, emulsifier, developer, cleaner, and processing parameters should be qualified for use together under the applicable inspection procedure.

Ideal Applications

• Method B penetrant inspection

• Aerospace component inspection

• Turbine and engine component testing

• Precision casting inspection

• Forging evaluation

• Machined-component inspection

• Automotive manufacturing

• Power-generation component inspection

• Production penetrant lines

• Fabrication QA/QC

• High-sensitivity surface inspection

• Maintenance and overhaul programs

• Surface-crack detection

• Surface-breaking porosity detection

• Industrial quality-control programs

Typical Discontinuities Detected

When used as part of a complete penetrant system, Method B inspection can help detect surface-breaking discontinuities such as:

• Fatigue cracks

• Grinding cracks

• Heat-treatment cracks

• Laps

• Seams

• Surface porosity

• Cold shuts

• Surface-connected lack of fusion

• Leak paths

• Other discontinuities open to the inspection surface

Liquid penetrant testing does not detect discontinuities that are completely below the surface.

Bulk Handling and Storage

For the 5-gallon container:

• Store in a cool, dry, well-ventilated area

• Keep the container securely closed when not in use

• Prevent contamination with penetrant, water, dirt, or other chemicals

• Use chemically compatible pumps and transfer equipment

• Clearly identify secondary containers

• Do not return contaminated emulsifier to the original container

• Maintain dedicated equipment where practical

• Protect from excessive heat and direct sunlight

• Follow facility procedures for chemical inventory and spill containment

Process Control

Routine process monitoring is important in Method B penetrant systems.

Inspection programs may include checks for:

• Emulsifier contamination

• Water contamination

• Penetrant carryover

• Process temperature

• Emulsification time

• Rinse effectiveness

• System performance using applicable reference standards

• Overall penetrant-system sensitivity

Process-control frequency and acceptance criteria should follow the governing procedure and applicable inspection requirements.

Safety and Handling

• Use with adequate ventilation

• Avoid prolonged skin and eye contact

• Wear suitable gloves, eye protection, and protective clothing

• Use respiratory protection when required by workplace assessment

• Keep the container closed when not in use

• Prevent spills and uncontrolled releases

• Use appropriate material-handling equipment for a full 5-gallon container

• Keep transfer equipment clean and chemically compatible

• Follow the current Safety Data Sheet and workplace procedures

• Dispose of contaminated product and waste according to applicable requirements

About Met-L-Chek

Met-L-Chek manufactures visible and fluorescent penetrants, emulsifiers, developers, cleaners, removers, magnetic particle materials, and related inspection chemistry for professional non-destructive testing. Its products support aerospace, automotive, fabrication, manufacturing, maintenance, energy, and industrial quality-control applications.

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