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IS 14713:2017 is the Indian Standard (BIS) for zinc rich priming paint - specification. This standard specifies the requirements, sampling, and testing methods for a single-pack, air-drying zinc-rich priming paint. It is intended for the primary corrosion protection of steel surfaces, providing cathodic protection due to its high zinc content.
Specifies requirements and methods of test for zinc rich priming paint, solvent-based and water-based, for protection of steel structures.
Overview
Status
Current
Usage level
Frequently Used
Domain
Materials Science — Painting, Coatings and Surface Finishing
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Ensure proper surface preparation (e.g., blast cleaning to Sa 2.5 as per IS 9954) is achieved before application for optimal performance.
! The high zinc content gives cathodic protection but requires continuous agitation during application to prevent the heavy zinc dust from settling.
! This is a single-pack primer, making it easier to use on-site compared to two-pack epoxy zinc-rich primers, but it generally offers lower chemical and abrasion resistance.
SSPC-Paint 20SSPC: The Society for Protective Coatings (now AMPP), USA
HighCurrent
Zinc-Rich Coatings (Type I - Inorganic and Type II - Organic)
Directly specifies requirements for inorganic and organic zinc-rich primers for steel.
ISO 12944-5:2018ISO (International Organization for Standardization), International
HighCurrent
Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 5: Protective paint systems
Defines zinc-rich primers and their requirements as a component within standardized protective paint systems.
AS/NZS 3750.9:2009Standards Australia / Standards New Zealand, Australia/New Zealand
HighCurrent
Paints for steel structures - Part 9: Organic zinc-rich primer
Specifies requirements for one- and two-pack organic zinc-rich primers for steel protection.
BS 4652:1995BSI (British Standards Institution), UK
MediumWithdrawn
Specification for zinc-rich priming paint (organic media)
Covered requirements for organic-based zinc primers, now harmonized under the ISO 12944 series.
Key Differences
≠IS 14713 has a single minimum zinc content requirement (80%), whereas SSPC-Paint 20 defines multiple performance levels (Level 1, 2, 3) with different zinc contents, allowing for more formulation flexibility (e.g., Level 3 requires only >65% zinc).
≠SSPC-Paint 20 mandates a solvent resistance test (MEK rub test per ASTM D4752) for inorganic zinc primers to verify cure, a specific requirement not explicitly mandated in the main performance table of IS 14713.
≠IS 14713 classifies paints as one-pack or two-pack and by broad binder type. SSPC-Paint 20 has a more detailed classification: Type I (Inorganic) and Type II (Organic), with sub-types like IA (solvent-borne inorganic) and IB (water-borne inorganic).
≠International standards like ISO 12944-5 are part of a comprehensive system that links paint type to specific atmospheric corrosivity categories (C1 to CX), which is not an integral part of the IS 14713 specification itself.
Key Similarities
≈All standards are based on the same fundamental principle: using a high concentration of metallic zinc pigment to provide cathodic (galvanic) protection to the steel substrate.
≈Both IS 14713 and ISO 12944-5 specify a minimum zinc dust content of 80% by mass in the dry film (or non-volatile matter), establishing a common benchmark for a 'true' zinc-rich primer.
≈The standards require similar core performance tests, including adhesion (cross-cut test) and corrosion resistance (neutral salt spray test), demonstrating a shared methodology for quality assurance.
≈All standards cover both major binder chemistries for zinc-rich primers: inorganic (e.g., ethyl silicate) and organic (e.g., epoxy, polyurethane).
Parameter Comparison
Parameter
IS Value
International
Source
Zinc Content in Dry Film (by mass)
Minimum 80%
Minimum 80% in non-volatile matter
ISO 12944-5:2018
Zinc Content in Dry Film (by mass), Level 2
Minimum 80%
77% to 85%
SSPC-Paint 20
Typical Dry Film Thickness (DFT) for testing
60 - 80 µm
60 - 80 µm (typical range for a single coat)
ISO 12944-5:2018
Salt Spray Resistance Test Duration
500 hours (no rusting, blistering, or loss of adhesion)
480 hours (for C4 High durability), with specific rust/blister ratings
ISO 12944-5:2018
Adhesion (Cross-Cut Test)
Rating shall be 1 (per IS 101 Pt 5/Sec 2)
Classification 0 or 1 (per ISO 2409)
ISO 12944-5:2018
Flexibility & Adhesion Test
Passes 1 mm cylindrical mandrel test
Not typically specified for brittle inorganic zinc primers; other adhesion tests are preferred.
SSPC-Paint 20
MEK Rub Test (for inorganic zinc)
Not a mandatory test in the standard's table.
Rating of 4 or 5 after 50 double rubs (per ASTM D4752)
SSPC-Paint 20
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Minimum zinc dust content in non-volatile matter80% by mass
Maximum surface dry time1 hour
Maximum hard dry time24 hours
Minimum volume solids35%
Flexibility and adhesion test mandrel diameter6 mm
Maximum fineness of grind40 microns
Tables & Referenced Sections
Key Tables
Table 1 - Requirements for Zinc Rich Priming Paint
Key Clauses
Clause 4.2 - Composition
Clause 4.3 - Physical Requirements
Clause 5 - Methods of Test
Annex A - Determination of Zinc Content in Dry Film