ECSS-Q-70-03A (7 April 2006)
ECSS-Q-70-03A (7 April 2006) ECSS-Q-70-03A (7 April 2006)
ECSS-Q-70-03A 7 April 2006 18 5.2.2 Blackening A difference shall be made between the "two-step" colouring and the "one-step" or "integral" colouring methods. 5.2.2.1 Two-step colouring a. Step 1: The part shall be immersed in a bath containing an inorganic dye (metal compound); commonly used metals include tin, cobalt, nickel, and copper. The dye particles are driven into the pores of the oxide, with or without a current applied. b. Step 2: The pores shall then be sealed, e.g. by immersion of the part in a boiling water based solution. NOTE After anodizing, the obtained oxide layer presents a columnar porous structure. c. In such colouring techniques, it shall be verified that: 1. The required thermo-optical properties are obtained, hence the minimum amount of dye in the coating is reached (see ECSS-Q-70-09). 2. The coating does not expel dye during adhesion; this ensures that the pores of the coating are sealed (see ECSS-Q-70-13). NOTE A typical minimum thickness value for two-step colouring is 20 µm. 5.2.2.2 Integral colouring a. This so-called one-step process combines anodizing and colouring to simultaneously form and colour the oxide cell wall. The layer obtained is generally very dense close to the bulk and porous in its outer part. b. In such colouring techniques, it shall be verified that: 1. The porous part of the coating is treated according to the process specifications (ground-off in most cases). 2. The required thermo-optical properties are obtained (see ECSS-Q-70-09). NOTE A typical minimum thickness value is 8 µm. 5.2.3 Treatment termination After completion of the black-anodizing process, the part treated shall be thoroughly rinsed in water and distilled water and then dried. 5.3 Handling and storage of materials and parts 5.3.1 Material storage a. The materials shall be stored in a cleanliness-controlled area, with an ambient temperature of (20 ± 3) °C and a relative humidity of (55 ± 10) %. b. The parts shall be stored in such a way as to prevent any damage or contamination by dust, moisture or grease. c. Limited-life materials shall be labelled with their shelf lives and date of manufacture, or date of delivery if the date of manufacture is not known. 5.3.2 Material handling and storage a. Coated parts shall only be handled with clean nylon or lint-free gloves. b. The coated parts shall not be bent, twisted or subjected to any stress that can damage the coating. c. Coated surfaces shall be shielded from contact by using polyethylene or polypropylene bags or sheets.
ECSS-Q-70-03A 7 April 2006 d. Mechanical damage shall be avoided by packing the polyethylene- or polypropylene-wrapped workpieces in clean, dust- and lint-free material. 19
- Page 1 and 2: Space product assurance Black-anodi
- Page 3 and 4: ECSS-Q-70-03A 7 April 2006 Foreword
- Page 5 and 6: ECSS-Q-70-03A 7 April 2006 Contents
- Page 7 and 8: ECSS-Q-70-03A 7 April 2006 Introduc
- Page 9 and 10: ECSS-Q-70-03A 7 April 2006 1 Scope
- Page 11 and 12: ECSS-Q-70-03A 7 April 2006 2 Normat
- Page 13 and 14: ECSS-Q-70-03A 7 April 2006 Terms, d
- Page 15 and 16: ECSS-Q-70-03A 7 April 2006 Principl
- Page 17: ECSS-Q-70-03A 7 April 2006 Black-an
- Page 21 and 22: 6.1 Visual inspection 6.2 Verificat
- Page 23 and 24: 7.1 General 7.2 Data 7.3 Nonconform
- Page 25 and 26: A.1 General A.2 Special utilities E
- Page 27 and 28: ECSS-Q-70-03A 7 April 2006 compleme
- Page 29 and 30: ECSS-Q-70-03A 7 April 2006 e. Steps
- Page 31 and 32: Table A-5: Dyeing with cobalt sulph
- Page 33 and 34: ECSS-Q-70-03A 7 April 2006 Bibliogr
- Page 35 and 36: ECSS Change Request / Document Impr
<strong>ECSS</strong>-Q-<strong>70</strong>-<strong>03A</strong><br />
7 <strong>April</strong> <strong>2006</strong><br />
d. Mechanical damage shall be avoided by packing the polyethylene- or<br />
polypropylene-wrapped workpieces in clean, dust- and lint-free material.<br />
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