blasted acc. to ISO 8501-1, cleanliness scale Sa 2½. 4 v8 x7 y C$ H2 r. B/ z X& a# `+ G7 w! h
ISO 8501-1:1994 ' \7 y% A6 C+ k! A涂料和有关产品使用前钢衬底的制备.表面清洁度的视觉评价. / U( f" M; h9 h3 @9 V6 H8 whttp://www.3dportal.cn/discuz/viewthread.php?tid=309855&highlight=8501; E( @2 S+ h! K$ n$ G1 K S4 [: ?
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最新版的; . f, ?/ }+ S5 L( O2 d: PISO 8501-1:2007 Preparation of steel substrates before application of paints and related products -- Visual assessment of surface cleanliness -- Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings : s" ^" z' t" J* J: T# a' R+ rhttp://www.3dportal.cn/discuz/viewthread.php?tid=336910&highlight=8501