ASTM B816-91e1

Standard Specification for Coatings of Cadmium-Zinc Mechanically Deposited

General Information

• Status: Historical
• Publication Date: 31-Dec-1990
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.06 - Soft Metals

Standards Content (Sample)

-
ASTM BBlb*El 91 = 0759530 05350b3 BTb W
AMERICAN SOCIETY FOR TESTING AND MATERIALS
[[Tb Designation: B 816 - 91''
1916 Race St. Philadelphia, Pa 19103
Reprinted from the Annual Book of ASThi Standards. CopyrigM ASTM
If not listed In the current combined Index, wlil appear in the ne>b ediibn.
Standard Specification for
Coatings of Cadmium-Zinc Mechanically Deposited'
This standard is issued under the fixed designation B 816; the number immediately following the designation iiidicuics ihc ycar of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicata ihc year of lust rcupprowl. A
superscript epsilon (t) indicates an editorial change since the last revision or reapproval.
(I NOTE: Editorial corrections were made to 9.5.3 and 9.6 in October 1992.
B 499 Method for Measurement of Coating Thicknesses
1. Scope
by the Magnetic Method: Non-magnetic Coatings on.
I. 1 General-This specification covers the requirements
Magnetic Basis Metals'
for a coating that is a mixture of cadmium and zinc
B 57 I Test Methods for Adhesion of Metallic Coatings7
deposited on metallic products by mechanical deposition.
B 602 Test Method of Attribute Sampling of Metallic and
The coating is provided in four thickness classes (see Table I)
inorganic Coatings3
and several finish types (see Table 2).
B 635 Specification for Coatings of Cadmium-Tin Me-
1.2 Toxicity-Warning: Cadmium is toxic; therefore
chanically Deposited on Iron and Steel3
these coatings should not be used on articles that will contact
B 695 Specification for Coatings of Zinc Mechanically
food or beverages, or for dental and other equipment that
Deposited on Iron and Steel3
may be inserted into the mouth. Also, the coatings should
B 696 Specification for Coatings of Cadmium Mechani-
not be used on articles that will be heated to high tempera-
cally Deposited3
tures, because cadmium will form toxic fumes. Similarly, if
B 697 Guidelines for Selection of Sampling Plans for
coated articles are welded, soldered, or otherwise heated
inspection of Electrodeposited Metallic and Inorganic
during fabrication, adequate ventilation should be provided
Coatings3
to exhaust toxic fumes.
B 762 Method of Variables Sampling of Metallic and
1.3 Similar Documents-Other kinds of mechanically
inorganic Coatings3
deposited coatings are covered by Specifications B 635,
E 27 Method for Spectrographic Analysis of Zinc and Zinc
B 695, and B 696.
Alloys4
1.4 The following precautionary caveat pertains only to
E 396 Test Method for Chemical Analysis of Cadmiums
the test method portion, Section 9, of this specification. This
E 536 Test Method for Chemical Analysis of Zinc and
standard does not purport to address all of the safety
Zinc Alloys5
problems, $any, associated wirh its tise. It is the responsi-
bility of the tiser of this standard to establish appropriate
3. Terminology
sajèty and health practices and determine the applicability of
3.1 Definitions-Some of the terms used in this are
regtilalory limitations prior to use.
B 374.
defined in Definitions
4. Significance and Use
2. Referenced Documents
4.1 Corrosion Resislunce, Gerierd-T hi s fu iict ional
2.1 ASTM Standards:
coating is used to provide corrosion resistance. The perfor-
B 1 17 Method of Salt Spray (Fog) Testing2
mance of this coating depends largely on its thickness and
B 183 Practice for Preparation of Low-Carbon Steel for
the kind of environment to which it is exposed. Published
Electroplating"
results of enviromental corrosion studies have demonstrated
B 242 Practice for Preparation of High-Carbon Steel for
that the coating provides corrosion resistance greater than
Electroplating3
equivalent thicknesses of zinc coatings in industrial environ-
B 320 Practice for Preparation of Iron Castings for
ments and greater corrosion resistance than equivalent
Electroplating3
thicknesses of cadmium coatings in marine environments."
B 322 Practice for Cleaning Metals Prior to Electroplating3
4.2 Galvanic Corrosion Resistunce-The galvanic couple
B 374 Definitions of Terms Relating to Electroplating*
that results in the corrosion of steel and aluminum parts in
B 487 Method for Measurement of Metal and Oxide
contact with each other in corrosive environments can also
Coating Thickness by Microscopical Examination of a
be minimized by plating the steel parts with this mechani-
Cross Section3
cally deposited coating.
4.3 Hydrogen Embrittlement, Absence of-The mechan-
I This specification is under the jurisdiction of ASTM Committee El-8 on
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
B08.04 on Soft Metals. Discontinued, see 1986 Annual Book of ASTM Siandards, Vol 03.06.
Current edition approved Aug. 15, 1991. Published December 1991. Annual ßook ofASTM Siandards, Vol 03.05.
2 Annual ßwk of ASTM Siandards, Vols 02.05 and 03.02. Holford, Raymond N., Jr., "Five Year Outd
...