SURFACE PREPARATION

Success of any surface painting is controlled by cleanliness of the surface being painted. More the clean surface results more in success of surface painting. Surface cleaning can be done by any of suitable method depending upon nature of surface, content or condition of the surface and climatic conditions that controls corrosiveness. In case pre-existing corrosion, special care requires to be taken. Depending upon nature of surface single or more than one or combination of both surface preparation method are to be used.

TYPES OF SURFACE PREPARATION METHOD

Chemical treatment as name suggest surface preparation is carried out by the way of dipping and cleaning the object in chemically active solutions, more commonly acids. The limitation of this method is surface area must be of smaller size and easy for handling.
Flame Cleaning The pre-painted material from the surface is removed by using oxyacetylene flame. With the high temperature.
Hand Tool Cleaning This kind of method includes chipping and scrapping followed by emery paper cleaning and / or brushing. This is time consuming but economically easy method. This method is also used where other methods can not be used effectively.
Mechanical or Power Tool Cleaning After surface preparation by using other methods, left over dust, scales etc. removed by using pneumatic tools such as rotary descalers, needle guns etc.
Blast Cleaning Object surface is subjected to bombardment with small hard particles at high velocity. Choice of abrasive particles depends on nature of surface.

ANNEXURE 7 . 1 LIST OF MACHINERAY

Sr. No.	Description	Capacity	Quantity ( NOs)	Make	YEAR OF INSTALLATION
1	Attritor	100 Ltr	2	Indian	2012
2	Attritor	60 Ltr	2	Indian	2013
3	Sand Mill	10 Ltr	1	Indian	2012
4	Ball Mill	500 Ltr	1	Indian	2015
5	Ball Mill	300 Ltr	1	Indian	2015
6	Pneumatic Pump	-	1	Indian	2012
7	Air Compressor	-	1	Indian	2012
8	High Speed Stirrors	2000 RPM	3	Indian	2015
9	Triple Roll Mill	-	1	Indian	2016