Process check on Cadmium plating

SNolanJF150621v10013-0001.jpg
SNolanJF150621v10013-0002.jpg

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

IBCC Digital Archive

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

Collection

Citation

J F Nolan, “Process check on Cadmium plating,” IBCC Digital Archive, accessed August 13, 2022, https://ibccdigitalarchive.lincoln.ac.uk/omeka/collections/document/28954.

Item Relations

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