ASTM B1025-24

1.1 This specification covers requirements for electrodeposited nanostructured zinc-nickel alloy coatings. The coatings can be applied to iron and steel, as well as other substrates, such as stainless steel and aluminum bronze, when an appropriate barrier coating is used.

1.2 The coatings are intended to provide corrosion protection to oil and gas, automotive, and aerospace components such as fasteners, brackets, and housings. The coatings may also be used in other industrial applications in which enhanced corrosion resistance is desired.

1.3 The coatings provide durability and corrosion resistance in diverse challenging environments, ranging from atmospheric exposures with variable humidity, offshore and marine settings subjected to saline conditions, to scenarios with fluctuating temperatures and potential chemical interactions found in automotive and aerospace applications.

1.4 Units-The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This standard has been revised to comply with the Restriction of Hazardous Substances (RoHS) Requirements that seek to limit the exposure of workers and the public to toxic metals. The alloy does not contain any of the six restricted hazardous substances.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.