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ASTM F1941-10
Standard Specification for Electrodeposited Coatings on Threaded Fasteners (Unified Inch Screw Threads (UN/UNR))
10 стр.
Заменен
Электронный (pdf)Печатное издание
96.72 $ (включая НДС 20%)
Разработчик:
Зарубежные/ASTM
ICS:
21.060.01 Fasteners in general / Крепежные изделия в целом25.220.40 Metallic. Including electrolytic depositions, cathodic coatings, autocatalytic coatings, etc. / Металлические покрытия. Включая электролитическое осаждение, катодные покрытия и т.д.
Сборник (ASTM):
01.09 Fasteners; Rolling Element Bearings / Крепежные изделия, Роликовые подшипники
Тематика:
Fasteners
Описание
Реферат

This specification covers application, performance and dimensional requirements for electrodeposited coatings on threaded fasteners with unified inch screw threads. It specifies coating thickness, supplementary hexavalent chromate or trivalent chromite finishes, corrosion resistance, precautions for managing the risk of hydrogen embrittlement and hydrogen embrittlement relief for high-strength and surface-hardened fasteners. The electrodeposited coating as ordered shall cover all surfaces and shall meet the requirements prescribed. Coated fasteners, when tested by continuous exposure to neutral salt spray shall show neither corrosion products of coatings (white corrosion) nor basis metal corrosion products (red rust) at the end of the test period. The coating thickness, embrittlement, corrosion resistance, and trivalent chromite finish shall be tested to meet the requirements prescribed.

Область применения

1.1 This specification covers application, performance and dimensional requirements for electrodeposited coatings on threaded fasteners with unified inch screw threads. It specifies coating thickness, supplementary hexavalent chromate or trivalent chromite finishes, corrosion resistance, precautions for managing the risk of hydrogen embrittlement and hydrogen embrittlement relief for high-strength and surface-hardened fasteners. It also highlights the differences between barrel and rack plating and makes recommendations as to the applicability of each process.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 The following precautionary statement pertains to the test method portion only, Section 9, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Ключевые слова:
Electrodeposited coatings; Screw thread; Threaded fasteners; Unified inch screw threads (UN/UNR)