What is the surface treatment level of P1, P2, P3?

Most of their peers in anti-corrosion coatings and coatings know
St2
,
St3
,
Sa2
1
/
2
2

,
Sa3
this level of surface treatment (see
" graphics, teach you to understand the paint before the steel surface rust treatment grade
)
. In fact, there are many grades of surface treatment before steel painting, typical of the following commonly used surface treatment standards as follows:
1
,
ISO 8501-1-2007
before coating steel Surface Treatment
-
Surface Cleanliness Visual evaluation of the poles such as rust and treatment rating
-
Part
1
: Uncoated steel surfaces and the complete removal of the original coating Rust grade and treatment grade of steel surface (
GB/T8923.1-2011
)
2
,
ISO 8501-2-In 1994
the steel surface treatment
-
surface cleanliness before coating was applied, visually evaluated the rust and treatment rating
-
2nd
2nd
Part: Treatment grade (
GB/T 8923.2-2008
) after partial removal of the original coating on coated steel surface
3
,
ISO 8501-3-2006
surface treatment
-
surface cleanliness before coating, visual evaluation of rust and treatment rating
-
Part
2
: Treatment grade for welds, edges and other surface defective areas (
GB/T 8923.3-2009
)and
P1
,
P2
The
,
P3
are the treatment grades for steel structure welds, edges and other surface-defective areas specified in
ISO 8501-3/GB/T 8923.3
. And these areas are the key parts of the anti-corrosion work, if not treated or mishandled, it is very easy to cause the early failure of anti-corrosion measures and the early corrosion of steel
the
. In this regard, I have been introduced in
," "Graphic, teach you how to prevent and control early defects in the coating of engineering machinery
article, click to read.