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MODUK - DTD-940

Cadmium Coating of Very Strong Steel Parts by Vacuum Evaporation (11.68)

active, Most Current
Organization: MODUK
Publication Date: 1 January 1968
Status: active
Page Count: 4
scope:

This specification covers the requirements for the cadmium coating of carbon steel and low alloy steel parts by vacuum evaporation for protection against corrosion. The process will find most use for the coating of parts made of steel having a specified minimum tensile strength exceeding 140 hbar (90 tonf/in2) but is equally suitable for steel of lower strength. The process avoids the risk of absorption of hydrogen and consequent hydrogen embrittlement. Although fine abrasion of the steel surface prior to coating is preferred, the process can be applied to clean fine machined surfaces.

Cadmium coating shall not be used on parts which are liable to reach temperatures above 2500C.

Document History

DTD-940
January 1, 1968
Cadmium Coating of Very Strong Steel Parts by Vacuum Evaporation (11.68)
This specification covers the requirements for the cadmium coating of carbon steel and low alloy steel parts by vacuum evaporation for protection against corrosion. The process will find most use for...

References

This document references:
DEF-SPEC-130 - Chromate Passivation of Cadmium and Zinc Surfaces (05.75)
Published by MODUK on January 1, 1961
Chromate passivation as described in this specification will normally be applied to cadmium and zinc e!ectroplating and to zinc base alloy die-castings unless the Design Authority stipulates...
This document references:
DEF-162 - Pre-Treatment and Protection of Steel Parts of Tensile Strength Exceeding 90 Tonf/Per Sq. In.
Published by MODUK
A description is not available for this item.
This document references:
DTD-904 - Cadmium Plating (05.63)
Published by MODUK on January 1, 1963
This specification covers the requirements for cadmium plating of carbon steel and low alloy steel parts for protection against corrosion. Parts made of steel of specified minimum tensile strength...
This document is referenced by:
DEF STAN 03-30: PART 5 - Treatments for the Protection of Metal Parts of Service Stores and Equipment Against Corrosion Part 5: Index, Related Documents and Sources
Published by MODUK on January 1, 1992
This Part of the Defence Standard lists the related documents and provides an index of contents.
This document is referenced by:
DEF STAN 03-30: PART 1 - Treatments for the Protection of Metal Parts of Service Stores and Equipment Against Corrosion Part 1: Advice to Designers on Corrosion and Its Prevention
Published by MODUK on January 1, 1991
This Part of the Defence Standard contains information and advice to the designers of service equipment on corrosion and its prevention. It starts with an outline of the elementary theory of...
This document is referenced by:
DEF STAN 03-30: PART 2 - Treatments for the Protection of Metal Parts of Service Stores and Equipment Against Corrosion Part 2: Schedule of Metallic and Allied Finishes for Iron and Steel and Non-Ferrous Metals and Alloys
Published by MODUK on January 1, 1991
This part of the Standard lists the metallic finishes for iron and steel, and non-ferrous metals and alloys.
This document is referenced by:
DEF STAN 03-30: PART 3 - Treatments for the Protection of Metal Parts of Service Stores and Equipment Against Corrosion Part 3: Schedule of Paint, Lacquer and Varnish Finishes
Published by MODUK on January 1, 1990
This Part of the Standard gives a list of paint, lacquer and varnish finishes used as protective coatings. The list is divided into sections on pre-treatment primers and sealers, primers, finishing...
This document is referenced by:
DEF STAN 03-30: PART 4 - Treatments for the Protection of Metal Parts of Service Stores and Equipment Against Corrosion Part 4: Schedule of Corrosion Preventives
Published by MODUK on January 1, 1992
This part of the Standard covers the protection of ferrous and non-ferrous metals by the use of corrosion preventives to assist in combating metal corrosion.
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