Sherwin Penetrant Technical Specifications:

Level 3 post emulsification (Method B, C, and D), Type 1 fluorescent penetrant, high sensitivity

Can be used for aerosols

Due to its low viscosity, excellent electrostatic spraying ability, excellent heat resistance, and low consumption of penetrant, it has been fully recognized and validated for three decades, with a flash point exceeding 200 ° F.

RC-65: No petroleum solvents

Key components of a turbine engine, such as turbine blades, rotating parts of the turbine engine, and the characteristics of SHERWIN permeate at the disc temperature:

1. Application:

Apply HM-406 only to clean and dry surfaces through spraying, flowing, brushing, or impregnation.

2. Stay time:

It is recommended to stay for 10 minutes, but in many cases, five minutes is sufficient. When there are suspicions of particularly tight cracks or critical parts, the dwell time can be extended to 30 minutes or more. Allow the penetrant to drain back from the surface of the part to the penetrant tank to save material.

3. Removal and washing method:

Rinse HM-604 from the surface of the part using room temperature water. To avoid cleaning trapped penetrant from surface defects, do not use high water pressure and temperature and avoid extending cleaning time.

Solvent wiping method: Use a clean, lint free dry cloth or towel to remove as much excess penetrant as possible. Wipe off the remaining penetrant film with a cloth or a towel lightly moistened with solvent. Use the least amount of solvent; Avoid flushing penetrant from defects. When removing excess penetrant, do not spray the solvent directly on the surface of the part. Rough surfaces require a greater use of solvents.

4. Drying:

It is recommended to use a circulating oven with a temperature not higher than 71 º C. Leave the parts in the oven for enough time to evaporate surface moisture. Before placing the parts in the oven, improve drying by using pressurized air to disperse and remove as much excess moisture as possible. When using solvent removers, allow the surface to completely dry before using the developer.

5. Development:

Use appropriate developer to apply the developer by cloud, powder, spray, or dip coating. Flaw markings are almost immediately visible under black light, but sufficient development time is required to improve the visibility of defects.

6. Inspection:

Inspect the parts under appropriate UV-A light intensity and minimum visible light.