|
全文和图片如下:
6Flashrustgrades
Threeflashrustgrades,designatedL,MandH,arespecified.Theyare
definedbywrittendescriptionsofthesurfaceappearanceofuncoatedsteel
areasbeforesubsequentpaintingtogetherwithrepresentative
photographicexamples.
ThedescriptionsofthesurfaceappearancearegiveninTable3andthe
representativephotographicexamplesareappendedtothispartof
ISO8501.
Table3—Descriptionsofthesurfaceappearanceforthree
flashrustgrades
L
Lightflashrust
Asurfacewhich,whenviewedwithoutmagnification,exhibitssmall
quantitiesofayellow/brownrustlayerthroughwhichthesteel
substratecanbeseen.Therust(seenasadiscoloration)canbe
evenlydistributedorpresentinpatches,butitwillbetightlyadherent
andnoteasilyremovedbygentlewipingwithacloth.
M
Mediumflashrust
Asurfacewhich,whenviewedwithoutmagnification,exhibitsalayerof
yellow/brownrustthatobscurestheoriginalsteelsurface.Therust
layercanbeevenlydistributedorpresentinpatches,butitwillbe
reasonablywelladherentanditwilllightlymarkacloththatisgently
wipedoverthesurface.
H
Heavyflashrust
Asurfacewhich,whenviewedwithoutmagnification,exhibitsalayerof
red-yellow/brownrustthatobscurestheoriginalsteelsurfaceandis
looselyadherent.Therustlayercanbeevenlydistributedorpresentin
patchesanditwillreadilymarkacloththatisgentlywipedoverthe
surface. |
|