1、mW: 669.24 : 621.357.035.224.6 DEUTSCHE NORMEN Jan-rp I967 DIN I702 Nickel Anodes m ickelanoden 1. 8COD This Standard applies to nickel anodes in the materials stated in the !Fable. 2. Deaimation For designating and ordering nickel anodes, the eyaibole or material numbers given in the Table ki this
2、Standard shall be used. Designation of a normal anode denoted by the eymbol NiB.0 or the material number 2.4040: Anode i99.0 DI10 1702 Anode 2.44 DI10 1702 or 3. ComDosition (see Table) The rounding rule according to DI10 1333 ahall be applied to each individual value found. !he rounded number must
3、not exceed the limits laid doni for composition. 4. Properties in service The anodes shall have uniform grain eise and shall dissolve evenly. 5. Form of deliveq For econoq in stocking, preference shall be given to anodes of the following types and dimensions. Composition in % bJ t. Permissible impur
4、ities Symbol Material nube Designation High purity anode Alloyingl elenenta ) 2.4036 c 0.10 Cu 0.06 Fe 0.10 MZI 0.05 Pb 0.01 si 0.08 In 0.01 Yi min. 99.7 c 0.01 Cu 0.1 Fe 0.15 n 0.05 Pb 0.01 si 0.0s Zn 0.01 Ni min. 99.4 Ni0 0.25 to 1.0 Depolarized anode 2.4038 Cu 0.1 Fe 0.2 Mn 0.1 Pb 0.01 Zn 0.01 Ni
5、 min. 99.0 C 0.25 to 0.35 Si 0.25 to 0.35 2.4042 Carbonized anode Ni99CCi Ni99.0 c 0.20 Cu 0.20 F. 0.20 w 0.2 si 0.10 Zn 0.02 pb 0.05 Normal anod. 2.4040 Ni min. 99.0 1 The nickel content includes up to 1.0 % by wt. Co. In doubtful cases, arbitration analyses and sampling according to the latest edi
6、tion of “Analyse der Hetalle“8(Analysie of Metals) by the Chemists Committee of the Gesellschaft Deutscher Metallhttef- und Bergleute S.V., Vol. 1: “Schiedeverfahren“ (Arbitration methods) and Vol. 3: “Probenahme (Sampling) shall be carried out (Berlin - Gttingen - Heidelberg: prhger-Verlag). hcplan
7、ations on page 2 DN 1702 engl. Preisgr. 2 leinverkauf der Normbltter dur& Beuth-Vertrieb GmbH, Boilin 30 und Kln Page 2 DIN 1702 a:1:oase!2 Thicknesses: 6 to 25 mm idths: 100 mm, 200 mm Lengths: 200 mm, 400 mm, rising in steps of 200 min 5.2. Billets Oval section: Width 70 rum, thickness 30 mm Lengt
8、hs: 200 rum, 400 mm, rising in steps of 200 mm - 6. Examples of order 100 anode6 in the form of plates 15 mm thick, 100 mm wide and 800 mm long in material denoted by the symbol Ni99.0 or material number 2.4WO: or 50 anodes in the form of billets IO00 mm long in material denoted by the -bol Ni99.MiO
9、 or material number 2.4038: or 5sQ * 4 50 billets IWO L DIN 1702 - 2.4036 Explanations The naterials for depolarized and carbonized anodes were OrigiMlly listed in the draft DIN 17740 “Nickel in semi-finished products“, Issue of July 1961, and denoted by the symbols Ni99.7(O2) and Ni99SiC. These are
10、 now included in DIN 1702 which comprises the standard nickel anodes. The materials referred to above have ceased to be contained in the finalized standard DIN 17740. The content of this Standard confines itself mainly to a Table listiirg 6ymbOl8, material numbers and analysis data for the four diff
11、erent anode grades. Information on use has been deliberately excluded because the wide range both of the electrolyte used and of the operating conditions prevailing make6 it impossible to give verifiable figures, for example, for optimum pH values and current densitiea, whilst generalizations such as average pH values or “current density not too high“ are of no value. It remains the objective of all the parties concerned, however, to collect the neceseary figures a0 that during some future revision the appropriate additions can be made to the Standard in this direction.
