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7.3 Coating finish (cf. tables 2 and 3)
7.3.1 Normal spangle (N)
This finish is obtained when the zinc coating is left to solidify normally. Either no spangle or zinc crystals of
different sizes and brightness appear, depending on the galvanizing conditions. The quality of the coating is
not affected by this.
If a pronounced spangle is desired, this shall be indicated at the time of ordering.
7.3.2 Minimized spangle (M)
This finish is obtained by influencing the solidification process in a specific way. The surface will have reduced
spangles, in some cases, not visible to the unaided eye. The finish may be specified if the normal spangle
applicable (cf. 7.3.1) does not satisfy the surface appearance requirements.
7.3.3 Regular zinc-iron alloy coating (R)
This coating results from heat treatment in which iron diffuses through the zinc. The surface has a uniform matt
grey appearance.
Normal spangle 什么意思?
这个是热镀锌钢板标准里的 |
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