具体请参考德国标准:EN 12476 Phosphate conversion coatings of metals : ~! u+ q, O* }1 @. _6 R$ v& \) t: I# L# E2 V" F
& d2 @2 e! [* g |0 m7 _2 `EXAMPLE 7 D" Z- p3 y2 n- i& nDesignation of a zinc phosphate type coating (Znph) applied to ferrous metal (Fe) to give corrosion protection ® at a mass per unit area of 3g/m2 ± 0.9 g/m2 (3) and for which the after-treatments are sealing (T2) and painting (T1) n3 N6 U1 L$ I* u- A Phosphate conversion coating EN 12476-Fe/Znph/r/T2/T1. J9 h$ A' `8 u: u: @