What is the primary use of this paint?

It is used as an anti-corrosive priming coat for bare iron and steel surfaces to prevent rust and prepare the surface for topcoats.

How long does it take for this primer to dry?

It typically reaches 'surface dry' condition within 4 hours and achieves a 'hard dry' state within 18 hours.

Can it be applied using a spray gun?

While specifically formulated for brushing, it can often be adjusted for spraying by using appropriate thinners as recommended by the manufacturer.

Which IS code details the testing methods for this primer?

The IS 101 series governs the methods of sampling and testing for this and other ready mixed paints.

IS 109

: 2017

Ready Mixed Paint, Brushing, Red Oxide-Zinc Chrome, Priming, For Ferrous Metals - Specification

CurrentFrequently UsedSpecificationMaterials Science · Painting, Coatings and Surface Finishing

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This standard specifies the requirements, composition, and testing methods for ready-mixed red oxide-zinc chrome primer designed for application by brushing. Engineers use this specification to ensure adequate anti-corrosive base coating for exposed ferrous metals and structural steel fabrications before applying finishing coats.

Specifies requirements and methods of test for ready mixed, brushing, red oxide-zinc chrome priming paint for ferrous metals.

Quick Reference Values

Surface drying timeMax 4 hours

Hard drying timeMax 18 hours

Flash pointNot less than 30°C

Zinc chromate content in pigmentMinimum 16%

Application methodBrushing

Practical Notes

Proper surface preparation (such as sandblasting or rigorous wire brushing) is critical; applying this primer over mill scale, rust, or grease will cause premature failure.

This primer is specifically formulated for ferrous metals (iron and steel) and should not be directly applied to galvanized iron or aluminum surfaces without proper mordant/etching treatments.

Ensure the primer is thoroughly stirred before application, as heavy pigments like red oxide tend to settle at the bottom of the container.