HG/T 3679-2011Ruthenium trichloride for metal anode coatings of electrolyzers (English PDF)

1 Scope

This standard specifies the requirements, test methods, inspection rules, packaging, marking, storage and safety of ruthenium trichloride products for dimensionally stable anode coating in electrolyzer.

This standard is applicable to ruthenium trichloride solid and aqueous hydrochloric acid solution prepared by sodium hypochlorite method with ruthenium powder or ruthenium compound as the main raw material and used for the dimensionally stable anode coating.

Molecular formula: RuCl3·nH2O

Relative molecular mass: 207.43 (according to international relative atomic mass in 2007)

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments (excluding any corrections) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the standards indicated below. For undated references, the latest edition of the normative document applies.

GB 190 Packing symbol of dangerous goods

GB/T 601 Chemical reagent - Preparations of standard volumetric solutions

GB/T 602 Chemical reagent - Preparations of standard solutions for impurity (neq GB/T 602-2002, ISO 6353-1: 1982)

GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods (neq GB/T 603-2002, ISO 6353-1: 1982)

GB/T 6682 Water for analytical laboratory use - Specification and test methods (mod GB/T 6682-2008, ISO 3696: 1987)

GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values

GB/T 9723 Chemical reagent - General rule for flame atomic absorption spectrometric analysis

GB 15346 Chemical reagent - Packaging and marking

HG/T 3921 Chemical reagent - Regulations for sampling and acceptance

3 Product classification

According to the product form, ruthenium trichloride is classified into solid ruthenium trichloride and liquid ruthenium trichloride (ruthenium trichloride aqueous hydrochloric acid solution).

4 Appearance and properties

5 Requirements

Ruthenium trichloride for dimensionally stable anode coating in electrolyzer shall meet those specified in Tables 1 and 2. In case of exceeding the scope or using recycled ruthenium and compounds as raw materials, the addition of impurity elements or other requirements, if necessary, may be agreed by the supplier and the demander and indicated in the contract.

6 Test methods

Unless otherwise specified, all the reagents used in this standard shall be analytically pure reagents; titration solutions, impurity standard solution preparations and products shall be prepared according to the requirements of GB/T 601 and GB/T 602; the water for tests shall meet the requirements of GB/T 6682 or have equivalent purity. The water for test items using atomic absorption method shall be Grade II water that meet the requirements specified in GB/T 6682 or water of equivalent purity, and that for test items using other methods shall be Grade III water that meet the requirements specified in GB/T 6682 or water of equivalent purity.