NF A01-830-1973 Zinc for galvanizing purposes Sampling for analysis 《电镀用锌 分析用样品的抽样》.pdf

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1、AFNL NF AOL-830 73 = LOL2372 0000709 174 O O I a Q AFNOR 1973. Droits de reprodudion ei de traductior rservs pour tous pays. I Enregistre par dcision du 12-2-73 Les observations relatives lo prsente norme doivent tre adresses h lAFNOR lour EUROPE CEDEX 7 92080 PARIS LA DEFENSE Imprirnwia Nouvrli Orl

2、banr. NF A 01430 1. TIRAGE 2-73 NORME FRANAISE ENREGISTREE ZINCS UTILISES EN GALVANISATION PRELEVEMENT DES ECHANTILLONS POUR ANALYSE NF A 01-830 Fvrier 1973 OBJET ET DOMAI NE DAPPLICATI ON La prsente norme a pour objet de normaliser les conditions de prlvement des chan- tillons destins lanalyse chim

3、ique ou spectrale des zincs utiliss en galvanisation. PRELEVEMENTS DES ECHANTILLONS POUR ANALYSE CHIMIQUE ET ANALYSE SPECTRALE DEMISSION SUR SOLUTION Prlvement de copeaux sur lingots Les chantillons pour analyse chimique sont prlevs et prpars conformment la norme NF A 55-101 N Zinc en lingots , para

4、graphe 3.2.1 : Prlvement et prparation des chantillons. Prlvement dchantillons sur un bain en fusion (en cours dutilisation) Avant tout prlvement dchantillon, on veillera tout particulirement ce que la surface du bain soit dbarrasse de tout polluant (oxydes, traces de flux, etc.). Le prlvement des c

5、hantillons de zinc dans le bain de galvanisation doit tre fait 5 cm au minimum de la surface du bain et plus de 20 cm des bords de la cuve au moyen dune louche de prlvement de prfrence en rfractaire. Le zinc prlev doit tre vers lentement en un mince filet dans un bac rempli deau propre, la tempratur

6、e ambiante. Au moment du transvasement du zinc dans leau, la louche de prlvement doit tre tenue moins de 30 cm au-dessus de la surface du liquide, afin de limiter toute vaporisation ou projec- tion dangereuse. La temprature du bain de zinc doit tre note au moment du prlvement. COPYRIGHT AFNOR Association Francaise De NormalisationLicensed by Information Handling Services

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