Friday, March 19, 2010
Sometimes, smallest of the defects can be hardly visible for human eyes. That is when engineers use the Liquid Penetrant (PT) or Dye Penetrant test. Liquid Penetrant Examination is a Non-Destructive Testing method used to detect surface breaking defects, such as cracks, laps, porosity etc., which are unperceivable with the bare eye.
The method is rest upon the ability of a fluid to be drawn into a "clean" surface-breaking flaw by smooth action. After a certain time period, unnecessary surface penetrant is displaced and a developer is applied that functions as a "blotter". Color contrast penetrants demand adequate white light whereas fluorescent penetrants are suggested to be used in dark environment and require ultraviolet "black light" where penetrant glows with a luminous color which can be easily seen from our eyes.
Friday, March 5, 2010
Some days ago I heard that Sri Lanka's ministry of tourism is going to develop a village called Kalpitiya in the western cost of the island, as a new tourist destination. I tried to find more information. It is quite a nice place with many small islands, white sandy beaches and yea! dolphins. Looking forward to travel there and see how it looks like.