ASTM B418-16a(2021) - 1.4.2021
 
1. Scope

1.1?This specification covers cast and wrought galvanic zinc anodes used for the cathodic protection of more noble metals and alloys in sea water, brackish water, other saline electrolytes, or other corrosive environments.

1.2?Type I anodes are most commonly used for such applications. The Type I anode composition in this specification meets the chemical composition requirements of MIL-A-18001K.

1.3?Zinc anodes conforming to this specification may be used in other waters, electrolytes, backfills, and soils where experience has shown that the specified composition is efficient and reliable. Type II anodes are most commonly used for such applications.

1.4?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.

1.5?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 become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.

1.6?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.

 
2. Referenced Documents

B899-21

Standard Terminology Relating to Non-ferrous Metals and Alloys

B949-23

Standard Specification for General Requirements for Zinc and Zinc Alloy Products

E29-22

Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

E527-23

Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

E536-23

Standard Test Methods for Chemical Analysis of Zinc and Zinc Alloys

MIL-A-18001K w/INT. AMENDMENT 3, 24 October 2007

Military Specification Anodes Sacrificial Zinc Alloy

ISO3815-2

Zinc and zinc alloys Part 2: Analysis by inductively coupled plasma optical emission spectrometry

ISO3815-1

Zinc and zinc alloys Part 1: Analysis of solid samples by optical emission spectrometry

B6-23

Standard Specification for Zinc