Sample no.

Code used

Sample with Pre-treatment

1

SSPN

SS-304 Panel New—Chemically cleaned

2

SSDN

SS-304 Dish New—Chemically cleaned

3

SSOP

SS-304 Old Plate—Chemically cleaned

(Known history—15 years of regular usage)

4

SSPO

SS-304 New Panel with a Thin Oil-film adsorbed on the surface

5

SSDO

SS-304 New Dish with a Thin Oil-film adsorbed on the surface

6

CPP

SS-304 Commercial Panel Polished from panel manufacturer

7

CPU

SS-304 Commercial Panel Unpolished from panel manufacturer