SIST EN 2436-001:2009

SIST EN 2436-001:2009 is the Slovenian adoption of EN 2436-001:2006 from CEN for aerospace paints and varnishes. It specifies basic requirements for a two-component, cold-curing, chromate-free epoxy or polyurethane primer used with or without a finish in aerospace applications. The standard also sets out the batch-release and qualification tests used to verify that the primer performs on defined aluminium alloy test pieces.

What does SIST EN 2436-001:2009 specify?

SIST EN 2436-001:2009 specifies the basic requirements for a corrosion-resistant, chromate-free primer for aerospace use. The primer is intended for defined aluminium alloy test pieces prepared to EN 3837, process A, and conditioned to ISO 3270, so the stated properties are tied to a controlled test surface and test environment.

The document is organized into scope, normative references, definitions, classification, and batch release and qualification testing. The detailed requirements are collected in Tables 1 to 5, which cover general requirements, physical and chemical characteristics, physico-chemical characteristics, mechanical characteristics, and environmental characteristics. TR 7000-9 is used for the subcase numbering in Tables 2 to 5.

What are the key requirements of SIST EN 2436-001:2009?

SIST EN 2436-001:2009 requires the primer to be a two-component, cold-curing, chromate-free epoxy or polyurethane material. In practice, that means the product has to be formulated and handled as a mixed system, and the supplier must identify whether it is Type A or Type B.

Product form and designation

Table 1 states that the components are a base, an activator, and, if needed, a thinner. The components are mixed in simple whole-number proportions by volume or by weight according to the manufacturer’s instructions. The same table gives the designation format, which is used when specifying the material in procurement or technical documentation.

Application and conditioning

Table 1 sets a specified dry film thickness and refers storage, shelf life, packaging, marking, flash point, health and safety, and quality assurance to EN 3840. It also requires conditioning to ISO 3270 for seven days before testing unless otherwise stated. In practice, this fixes the handling and test preparation conditions so different laboratories compare like with like.

Batch release and qualification

Clause 5 separates routine acceptance from full product qualification. Batch release testing uses only the tests marked with an asterisk in Tables 2 to 5, while qualification testing uses all tests listed in Tables 1 to 5. This matters because a supplier can accept a production batch without repeating the whole qualification program, but must still demonstrate full compliance when qualifying the product.

Surface condition and appearance

Table 2 requires the supplied material to be free from defects such as skinning, gelling, hard settlement, and other conditions that would prevent a sound film. It also requires the applied film to be even and free from application defects. For the user, this is a practical check on mix stability, storage behavior, and coating appearance before more detailed performance testing.

Performance checks

Tables 2 to 5 cover the main performance areas: sedimentation, pot life, viscosity, fineness of grind, non-volatile matter, VOC content, density, flash point, drying time, colour, gloss, adhesion, scratch resistance, resistance to fluids, water behavior, and resistance to neutral salt spray. These tests show whether the primer can be applied, cured, and then survive service exposure on aerospace parts.

Substrate-specific testing

The requirements are based on defined aluminium alloy panels, including clad and unclad A2 2024-T3 specimens prepared by EN 3837 and pickle-treated with EN 2334 where specified. Some environmental and mechanical tests use scribed panels. This means the standard checks not only coating quality but also how the primer protects damaged or exposed areas.

What terms does SIST EN 2436-001:2009 define?

• Type A - An epoxy primer based on the reaction between an epoxy resin and an activator with amino functional groups.
• Type B - A polyurethane primer based on the reaction between a hydroxyl-functional resin and a polyisocyanate activator.
• Batch release testing - The limited set of tests marked with an asterisk that are required for batch acceptance.
• Qualification tests - The full set of tests in the standard used to qualify the product for use.
• Pot life - The usable time of the mixed material before its properties change beyond the required limit.
• VOC - Volatile organic compound content, used here as a measured characteristic of the mixed coating material.

Who uses SIST EN 2436-001:2009?

SIST EN 2436-001:2009 is used by aerospace coating manufacturers, formulators, test laboratories, and quality assurance staff. Buyers and specification engineers use it when defining a primer for aerospace parts, and production teams use it for batch acceptance checks and product qualification. It is also relevant when comparing alternative substrates, alternative primers, or different drying conditions through supplementary tests.

Which standards are used with SIST EN 2436-001:2009?

What does the SIST EN 2436-001:2009 document contain?

The document contains a general requirements table, then tables for physical and chemical characteristics, physico-chemical characteristics, mechanical characteristics, and environmental characteristics. It also contains the test-piece preparation conditions, conditioning requirements, and the links between each property and the relevant EN 3840 test method.

Its tables show how to check appearance, mixture stability, curing behavior, colour, gloss, adhesion, scratch resistance, fluid resistance, water behavior, and corrosion resistance. The document is therefore structured for specification writing, product qualification, and routine acceptance testing in aerospace coating supply chains.