What is water washable penetrant?
Water-washable or self-emulsifiable penetrants contain an emulsifier as an integral part of the formulation. The excess penetrant may be removed from the object surface with a simple water rinse. Thus, water-washable penetrant systems provide ease of use and a high level of sensitivity.
Which method of penetrant removal is water washable?
Water washable penetrants are removed by manual or automated water spray, manual wipe or air agitated immersion wash. If a manual spray is used the water pressure should not exceed 40 psi; the temperature should be between 50–100°F / 10–38°C using a coarse spray at a minimum distance of 12 in / 30 cm from the part.
What are the 4 methods of penetrant systems?
The four methods are listed below:
- Method A – Water Washable.
- Method B – Post-Emulsifiable, Lipophilic.
- Method C – Solvent Removable.
- Method D – Post-Emulsifiable, Hydrophilic.
When using a water washable penetrant testing process Why should the water rinse temperature remain constant?
| Q. | When using a water washable penetrant testing process, why should the water rinsetemperature remain constant? |
|---|---|
| A. | To avoid changes in rinse efficiency |
| B. | To maintain the temperature of the part |
| C. | To avoid over washing |
| D. | To avoid under washing |
What is water washable?
Water Washable Resin is a 3D printing photopolymer with a highly attractive crystal clear finish and great mechanical properties, for which excess resin can be dissolved simply by rinsing. Printing with Water Washable Resin is the same as printing with any other FSL resin, and requires no additional expertise.
What can be detected by liquid penetrant test?
Liquid penetrant testing (PT) is a one of non-destructive test, which can detect surface-breaking defects-such as hairline cracks, surface porosity, leaks in new products, and fatigue cracks. It can change invisible defects to visible defect by using liquid dye.
How do you clean penetrant dye?
Removing Penetrant When sufficient penetration time has been allowed, wipe the surface clean with a clean towel or cloth. Repeat if necessary. Some surfaces will require only wiping. In general, however, remove excess surface penetrant with clean cloths premoistened with cleaner/remover.
Which penetrant method is the easiest to use?
Solvent removable, visible dye, process is the easiest and most portable penetrant process. The first step in penetrant testing is cleaning the surface to be inspected. Typical cleaning methods are steam, vapor degrease, ultrasonic and solvent cleaning. Solvent cleaning is the most commonly used method.
Which of the following is NOT (!) An advantage of a water washable fluorescent penetrant process?
| Q. | Which of the following is not (!) an advantage of a water washable fluorescentpenetrant process? |
|---|---|
| C. | It is readily removed from shallow discontinuities |
| D. | It has low cost, low processing time compared to the post emulsified penetrant process |
| Answer» c. It is readily removed from shallow discontinuities |
Which type of penetrant is least susceptible to over washing?
| Q. | Which type of penetrant process is least susceptible to over washing? |
|---|---|
| B. | Water washable |
| C. | Post emulsifiable |
| D. | Fluorescent |
| Answer» c. Post emulsifiable |
Are water washable resins good?
I found that while the models are water washable, the resin vat is not. I still had to use IPA to clean it adequately. On to the models, so this resin works excellent! That is if you aren’t printing anything too thin.
How does water washable resin work?
Water-washable resins enable you to rinse your 3D printed parts with tap water instead of alcohol.