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BS 729: 1961, was entitled 'Zinc coatings on iron and steel articles" and it was divided into two parts, namely Part 1, "Hot-dip galvanized coatings', and Part 2 'Sherardized coatings'. This edition, which is a revision of BS 729, Part I, applies solely to galvanized coatings and in consequence its title has been changed to 'Hot dip galvanized coatings on iron and steel articles'. Sherardized coatings will still be covered by BS 729, Part 2, for the time being, but this standard is currently undergoing revision and will be re-issued with a new number and the new title of 'Sherardized coatings on iron and steel articles'. This revision takes cognizance of the provisions of the three recommendations of the International Organization for Standardization (ISO) which relate to hot dip galvanized coatings, namely ISO Recommendation R1459+, ISO Recommendation R1460t and ISO Recommendation R1461t. A minimum coating weight requirement for any individual test area has been introduced, but the specified values are greater than those recommended in ISO Recommendation R1461.

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