Process check on Cadmium plating
Title
Process check on Cadmium plating
Description
Instruction for carrying out plating.
Creator
Date
1942-08-23
Temporal Coverage
Coverage
Language
Type
Format
Two page typewritten document
Publisher
Rights
This content is available under a CC BY-NC 4.0 International license (Creative Commons Attribution-NonCommercial 4.0). It has been published ‘as is’ and may contain inaccuracies or culturally inappropriate references that do not necessarily reflect the official policy or position of the University of Lincoln or the International Bomber Command Centre. For more information, visit https://creativecommons.org/licenses/by-nc/4.0/ and https://ibccdigitalarchive.lincoln.ac.uk/omeka/legal.
Contributor
Identifier
SNolanJF150621v10013
Transcription
[Underlined] Process Check on Cadmium Plating to D.T.D. 904.
“Y” Shed. 26. 8. 42. [/underlined]
[Underlined] Preparation [/underlined]
Parts are effectively cleaned before plating in a Zonax electrical cleaning bath, which is maintained just below boiling point at approx. 180°F, and at a current of 5 volts, in accordance with maker’s instructions.
[Underlined] Electrolyte [/underlined]
Is a Cannings proprietary product and is in a fairly clean condition. A sample is taken approximately once weekly by the W.I.D. for test, and additions made as required.
[Underlined] Plating [/underlined]
Is carried out at room temperature, (bath is not heated). Cathode and anode rails across the bath are in a satisfactorily clean condition. Parts are correctly suspended in bath with copper wire for a period of 20 to 30 mins. Bath is not agitated. Voltage and amperage are correct.
[Underlined] Washing after Plating. [/underlined]
Parts are washed in cold, then hot running water and allowed to dry.
[Underlined] Removal of Brittleness [/underlined]
Parts are tempered in oil at a temperature between 100° and 200°C.
[Underlined] Tests. [/underlined]
Test pieces are put in once per week, the last one dated 25/8/42 /contd.
[Page break]
Contd/
They are subjected to porosity and thickness tests. Thickness on last test piece was 0.0004” and porosity was O.K.
Book records, which are kept of all electrolyte tests and test pieces, were checked and found in order. It was noted that thickness of coat is measured by micrometer and not by weight as in Appendix II of D.T.D. 904.
Process as viewed is considered satisfactory, with the exception of measurement of coating by micrometer instead of by weight.
S. F. Nolan
“Y” Shed. 26. 8. 42. [/underlined]
[Underlined] Preparation [/underlined]
Parts are effectively cleaned before plating in a Zonax electrical cleaning bath, which is maintained just below boiling point at approx. 180°F, and at a current of 5 volts, in accordance with maker’s instructions.
[Underlined] Electrolyte [/underlined]
Is a Cannings proprietary product and is in a fairly clean condition. A sample is taken approximately once weekly by the W.I.D. for test, and additions made as required.
[Underlined] Plating [/underlined]
Is carried out at room temperature, (bath is not heated). Cathode and anode rails across the bath are in a satisfactorily clean condition. Parts are correctly suspended in bath with copper wire for a period of 20 to 30 mins. Bath is not agitated. Voltage and amperage are correct.
[Underlined] Washing after Plating. [/underlined]
Parts are washed in cold, then hot running water and allowed to dry.
[Underlined] Removal of Brittleness [/underlined]
Parts are tempered in oil at a temperature between 100° and 200°C.
[Underlined] Tests. [/underlined]
Test pieces are put in once per week, the last one dated 25/8/42 /contd.
[Page break]
Contd/
They are subjected to porosity and thickness tests. Thickness on last test piece was 0.0004” and porosity was O.K.
Book records, which are kept of all electrolyte tests and test pieces, were checked and found in order. It was noted that thickness of coat is measured by micrometer and not by weight as in Appendix II of D.T.D. 904.
Process as viewed is considered satisfactory, with the exception of measurement of coating by micrometer instead of by weight.
S. F. Nolan
Collection
Citation
J F Nolan, “Process check on Cadmium plating,” IBCC Digital Archive, accessed April 26, 2024, https://ibccdigitalarchive.lincoln.ac.uk/omeka/collections/document/28954.
Item Relations
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