BS EN 2899:2018 pdf download.Aerospace series – Vulcanized rubbers – Test on the susceptibility to corrosion in a damp atmosphere of metals in contact with vulcanized rubbers.
2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2071, Aerospace series — Sheets in aluminium and aluminium alloys — Thickness 0,25 mm ≤ a ≤ 6 mm — Dimensions EN 2217 1 , Steel FE-PL52 S — 1 080 MPa ≤ R m ≤ 1 250 MPa — Sheets and plates 2 mm ≤ a ≤ 20 mm — Aerospace series 2 EN 2395, Aerospace series — Aluminium alloy AL-P2014A — T4 or T42 — Sheet and strip — 0,4 mm ≤ a ≤ 6 mm EN 3525, Aerospace series — Steel FE-PL1505 (15CrMoV6) — Air melted — Hardened and tempered — Plate — 6 mm < a ≤ 20 mm — 1 080 MPa ≤ R m ≤ 1 280 MPa ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods
3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp3.1 contact corrosion the visually perceptible deterioration of the metal surface in contact with rubbers, after exposure in a damp atmosphere
4 Principle The rubber test pieces shall be directly placed after immersion in the test fluid between two test metal disks and exposed to a damp atmosphere under defined conditions. After exposure, the metal disks shall be visually examined so that deterioration due to corrosion can be noted.
5 Apparatus and auxiliary products 5.1 Apparatus   test assembly which enables a compression of (12 ± 3) % of the rubber test pieces by means of metal disks (Figure 1);   a device for producing x 20 magnification;  climatic chamber where a relative humidity of 95 % minimum can be obtained at (23 ± 2) °C. 5.2 Auxiliary products   polyethylene gloves;   appropriate solvent;   lint free cotton cloth;   test fluids.
6 Specimens 6.1 Metal disks 6.1.1 Material Type 1 – Aluminium alloy AL-P2014A – T4 or T42 according to EN 2395. Type 2 – Steel FE-PL52S – 1 080 MPa ≤ R m ≤ 1 250 MPa according to EN 2217. 6.1.2 Dimensions The metal to be tested shall be circular disks of an outer diameter (120 ± 0,5) mm, with a (20 0 0,2 + ) mm diameter hole in the centre (see Figure 1). These disks shall be 5 mm thick minimum if they are in steel and 10 mm minimum thick if they are in aluminium so that they are not deformed when gripped. 6.1.3 Preparation The metal disks shall have a roughness of 0,4 µm maximum on all surfaces. The edges shall be rounded. 6.1.4 Number For each test and exposure method, use two metal disks. The two disks may be made of the same metal or of two different metals. 6.2 Rubber test pieces 6.2.1 Material According to the material standard.BS EN 2899 pdf download.