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IS 9862:2008 is the Indian Standard (BIS) for powder coatings for general purposes - specification. This standard specifies the requirements and testing methods for thermosetting powder coatings intended for general industrial purposes. It covers two types of coatings (for interior and exterior use), detailing their powder properties, film characteristics like hardness and adhesion, and resistance to environmental factors. It serves as a quality benchmark for manufacturers and users of general-purpose powder coatings.
Specifies requirements and methods of test for powder coatings suitable for general purposes on various substrates.
Overview
Status
Current
Usage level
Frequently Used
Domain
Materials Science — Painting, Coatings and Surface Finishing
! This is a general-purpose standard. For more specific resin chemistries, refer to the IS 13871 series (Part 1: Epoxy, Part 2: Epoxy-Polyester, Part 3: Polyester).
! Proper surface preparation (pre-treatment) of the substrate is critical to achieve the performance specified in this standard, although pre-treatment itself is outside the scope of this document.
! The performance of the coating heavily depends on the curing schedule (time and temperature), which must be strictly as per the manufacturer's recommendation.
BS EN 12206-1:2021BSI (British Standards Institution) / CEN (European Committee for Standardization), UK/Europe
HighCurrent
Paints and varnishes — Coating of aluminium and aluminium alloys for architectural purposes — Part 1: Coatings prepared from thermosetting powder coating materials
Specifies performance for powder coatings on aluminum for architectural use, a major application covered by the 'general purpose' scope of IS 9862.
AAMA 2603-20FGIA (Fenestration and Glazing Industry Alliance) / formerly AAMA, USA
HighCurrent
Voluntary Specification, Performance Requirements and Test Procedures for Pigmented Organic Coatings on Aluminum Extrusions and Panels
Defines performance criteria for standard powder coatings on aluminum, aligning with the 'general purpose' tier of performance.
ASTM D3451 / D3451M - 22ASTM International, USA
MediumCurrent
Standard Guide for Testing Coating Powders and Powder Coatings
Provides a comprehensive guide to test methods for powder coatings but does not set performance requirements or pass/fail criteria like a specification.
BS 6496:1984BSI (British Standards Institution), UK
HighWithdrawn
Specification for powder organic coatings for application and stoving to aluminium alloy extrusions, sheet and preformed sections for external architectural purposes...
Historically, this was the key UK specification for architectural powder coatings and a direct predecessor to the current European standard.
Key Differences
≠IS 9862 has a broad 'general purpose' scope, whereas standards like BS EN 12206-1 and the AAMA series are specifically for architectural applications on aluminum, implying a default focus on exterior durability.
≠The AAMA standards (2603, 2604, 2605) establish a clear tiered system of durability (e.g., 1, 5, 10 years Florida weathering), which is absent in IS 9862's single set of requirements.
≠While IS 9862 specifies accelerated weathering (1000 hours QUV), AAMA 2603 requires 1-year of natural South Florida weathering, which is considered a more definitive test of exterior durability.
≠BS EN 12206-1 and AAMA specifications place a very strong emphasis on specific types of substrate pre-treatment (e.g., chromate, chrome-free) as an integral part of the certified coating system, which is less prescriptive in IS 9862.
Key Similarities
≈All standards mandate a core suite of mechanical tests, including adhesion (cross-cut), impact resistance, and flexibility (mandrel bend), to ensure basic coating integrity.
≈The test methodology for corrosion resistance is fundamentally the same, using a neutral salt spray test (as per ASTM B117 or ISO 9227) for a specified duration (typically 1000 hours for the base level).
≈Many test methods specified in IS 9862 are based on or technically equivalent to ISO and ASTM methods (e.g., ISO 2409 for cross-cut), which are the same methods referenced in the international standards.
≈All specifications require the coating to meet a minimum dry film thickness (DFT) for testing, typically around 50-60 microns, to ensure performance properties are adequately represented.
Parameter Comparison
Parameter
IS Value
International
Source
Adhesion (Cross-Cut Test)
Classification 0 or 1 (as per IS 101 Pt 5/Sec 2 / ISO 2409)
No removal of coating (Scale 0) for dry, wet, and boil adhesion tests
AAMA 2603-20
Impact Resistance (Direct)
No cracking or detachment at 1.13 Nm (10 in-lb)
No cracking or detachment at 2.5 J (approx. 22 in-lb)
BS EN 12206-1:2021
Flexibility (Mandrel Bend)
Pass 5 mm mandrel, no cracking or loss of adhesion
Pass 4 mm mandrel, no cracking or loss of adhesion
AAMA 2603-20
Salt Spray Resistance (Duration)
1000 hours (max 3 mm creep from scribe)
1000 hours (min rating 7 per ASTM D1654, approx. 1/8" or 3.2 mm creep)
What is the minimum required pencil hardness for a glossy powder coating?+
A minimum hardness of 'H' is required for glossy and semi-glossy finishes. (Table 2)
What adhesion rating is required?+
The coating must achieve Class 0 in the cross-cut adhesion test as per IS 101 (Part 5/Sec 2). (Table 2)
What is the difference between Type 1 and Type 2 coatings?+
Type 1 is for interior use and Type 2 is for exterior use. Type 2 has higher durability requirements, such as a longer minimum salt spray resistance (480h vs 240h). (Clause 3.1 & Table 2)
How is coating flexibility tested?+
Using a 6 mm cylindrical mandrel bend test. The film should show no signs of cracking or detachment when bent around the mandrel. (Table 2)