A quick drying developer for the non-destructive testing of surfaces and structures.Many cracks in engineering materials can be deep in spite of having a very small opening on the surface - and can cause very serious or critical defects. By normal visual inspection such cracks may be very difficult to detect - but penetrant flaw detection is an extension of the visual inspection method. The inspection is carried out using 3 products:
- Flaw Detector Cleaner
- Flaw Detector Penetrant
- Flaw Detector Developer
Flaw Detector Developer is a dispersion of a white powder in a fast evaporating solvent; giving a high contrast visual reference.
FEATURES
- The inspection can be carried out with ready-to-use aerosols
- Results are produced quickly and easily
- An economical technology with no need for expensive and advanced equipment
- A sensitive and reliable test method
- Widely applicable - regardless the nature of the materials and shape of the objects
- RCC-M Tome III Chap - MC4200 - ASME Code Section V
APPLICATIONS
Non-destructive inspection of:
- Materials
- Parts
- Assemblies
- Equipment
- Surfaces and Structures:
- Detects cracks
- Lack of fusion
- Open cavities in welded parts
- Finds cracks and cavities caused by metal fatigue and cutting operations
- Check for porosity or leaks in:
- Pipes
- Tanks
- Boilers
- Heat exchangers
- Discontinuities
- Laps
- Folds and Cracks in Castings
- Forgings and Ceramics
DIRECTIONS
Do not use at ambient temperatures below 10OC. In liquid penetrant inspections - the test object or material is coated with a visible dye solution. The excess dye is removed from the surface and a developer is then applied. The developer acts like a blotter and draws penetrant out of the imperfections of the surface. With visible dyes the vivid colour contrast between the penetrant and the developer makes the bleed-out easy to see.
Cleaning of the surface - The surface to be checked must be clean - degreased and dry. All soil such as rust - oil - grease - paint etc - which can mask the imperfections must be removed. Finish the cleaning by spraying Flaw Detector Cleaner generously. If possible wipe with an absorbent cloth and allow to dry thoroughly.
Penetrant application - Shake the can of Flaw Detector Penetrant prior to use. Spray the penetrant in a light - even film on the surface wetting all areas to be inspected. Allow to drain for 10 to 20 minutes.
Excess penetrant removal - Remove excess of penetrant by wiping the surface using a lint-free cloth. Apply water (Flaw Detector Penetrant is water washable) until all visible - coloured traces are removed. Care must be taken that only penetrant on the surface is removed. Dry properly.
Development - Shake the can of Flaw Detector Developer thoroughly prior to use. Spray a light - homogeneous coat of Developer from a distance of about 20 cm. Avoid any excess Developer (to avoid masking the finest flaws). Allow to develop for at least 7 minutes so that imperfections are visible. Visual inspection of defects - As time passes - the defects will appear as red spots or lines on a white background.
The speed of appearance - the shape and dimensions can give information about the nature of the defects. If necessary after inspection clean the surface with cleaner and protect against corrosion with one of Ambersils corrosion protection products such as Ambersil Corrosion Inhibitor.
SPECIFICATIONS
- Appearance : powder dispersed in a solvent blend
- Color : white
- Odour : solvent
- Application temperature : > 10°C
- Specific gravity (@ 20°C) : 0.781
- Boiling range (solvent) : 40 - 65°C
- Flash point liquid : < 0°C
- Auto-ignition temperature : > 200°C
- Solubility in water : not soluble
STORAGE
The product may be stored at normal ambient temperatures and has a shelf life of not less than 72 months with correct storage. Aerosols should always be stored below 50°C - away from direct heat and naked flame.