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Re: [MW:13273] Surface roughness measurement instruments.

By Materials & Welding
Dear sir,
 
Please Find the Below Answer In Green.
 
 
On Thu, Dec 22, 2011 at 2:08 PM, Vasantharao <vasantharao@yahoo.in> wrote:
Dear Experts,

I work as inspection Engineer. When i go for Blasting inspection, contractor provided  me profile comparator for surface roughness measurement.

Contractor do  Grit blasting in the shop.

I need to measure surface roughness  -  75-100 microns      Painting system No#1
                                                            50-75 microns        Painting system No#2

Queries

Q 1: Comparator is enough for surface roughness measurements.

Q2: Is any other tools available for roughness measurement?. For measuring the roughness as per SA 2 1/2, we can measure with help of Press " O " Films, With help of Dail Gauge  we can Measuring the microns in a Press "O" Flim. Minus -50 microns from absorved to get actual valve. After blasting with in 3hrs primer to be painted.
 
Q3:  What is the normal industry practice.


Pl. provide your valuable suggestions as i'm new for painting activities.

Rao.


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