BS EN 4707:2014
$86.31
Aerospace series. Acid pickling of aluminum and aluminum alloy without hexavalent chromium
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 14 |
This standard specifies the acid pickling of aluminium and aluminium alloys.
It is applicable whenever referenced.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | Foreword |
| 6 | 1 Scope 2 Purpose of process 3 Normative references 4 Information for the processor 5 Condition of parts prior to processing |
| 7 | 6 Process schedule Table 1 7 Pre-treatments |
| 8 | 8 Treatment 9 Rinsing 10 Drying |
| 9 | 11 Required characteristics and inspection 11.1 Parts 11.1.1 Inspection before treatment 11.1.2 Cleanliness 11.1.3 Inspection after treatment 11.2 Process 11.2.1 Air used for drying or other operations shall be substantially dry and free from oil. 11.2.2 Chemical analysis of the pickling solutions (and different baths involved in the sequence of operations) shall be carried out at regular intervals to determine the content of heavy metal, chloride, iron copper etc., when requested. 11.2.3 The bath shall be discarded when pitting of parts occurs or when solid material starts to precipitate on cooling the solution to ambient temperature. The process must be managed by monitoring the significant parameters as aluminium and polluant… 11.2.4 The purity of the rinsing water shall be determined by conductivity/resistivity measurements. 11.2.5 When required for adhesive bonding, the test to the relevant bonding standard shall be carried out to ensure that the process has been correctly applied. 11.2.6 Each pickling process must be characterized by its specific etching rate range. All pickling process must not lead to localized attack. 11.2.7 The etching rate of the complete sequence of operations must be periodically measured to ensure the control of the process. 12 Quality assurance 12.1 Approval of the processor |
| 10 | 12.2 Process approval 12.3 Acceptance 13 Health, safety and environmental aspects |
| 11 | Annex A (normative) Pickling bath Table A.1 |
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