T/CHTS 20030-2023 Road-grade zinc-aluminum composite coating steel guardrail

GB/T 228.1-2010 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 232-1999 Metallic materials—Bend test GB/T 232-2010 Metallic materials—Bend test GB/T 232-2024 Metallic materials—Bend testing method GB/T 700-1988 Carbon structural steels GB/T 700-2006 Carbon structural steels GB/T 1733-1993 Determination of resistance to water of films GB/T 1740-2007 Determination of resistance to heat and humidity of paint films GB/T 4336-2002 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-Alloy steel(routine method) GB/T 4336-2016 Carbon and low-alloy steel—Determination of multi-element contents—Spark discharge atomic emission spectrometric method (routine method) GB/T 5270-2005 Metallic coatings on metallic substrates—Electrodeposited and chemically deposited coatings—Review of methods available for testing adhesion GB/T 5270-2024 Metallic coatings on metallic substrates—Electrodeposited and chemically deposited coatings—Review of methods available for testing adhesion GB/T 10125-1997 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2012 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2021 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 18226-2000 Specification for steel components anticorrosion of highway traffic engineering appurtenances GB/T 18226-2015 Specification for steel component anticorrosion of highway engineering GB/T 22040-2008 Technical requirements and determination of weathering quality for plastics of highway furnatures GB/T 18226-2025 Specification for steel component anticorrosion of highway traffic engineering