ASTM A gives information on recommended steel chemistry for steel to be galvanized, as well as required venting/drainage hole. ASTM A/A M. Standard Practice for Providing High-Quality Zinc Coatings (Hot-Dip) provides details on steel selection and other design practices such as. ASTM Apdf – Download as PDF File .pdf), Text File .txt) or read online.
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Historical Version s – view previous versions of standard.
Work Item s – proposed revisions of this standard. This practice covers the precautions that should be taken to obtain high-quality galvanized coatings.
Assemblies should consist of elements of similar chemistry and surface condition. Whenever different analyses of steel or different surfaces of steel are united in an assembly the galvanized finish is not generally uniform in appearance.
These differences include excessively rusted surfaces, pitted surfaces, machined surfaces, cast iron especially with sand inclusion, cast steel, malleable iron, hot-rolled steel, and cold-rolled steel. All oil or grease should be removed from both the sheet steel and wire or rod before rolling.
Welding flux residues shall be removed by standard galvanizing cleaning techniques and are best removed at the gun. All fabricated assemblies shall be so designed with asm and drain holes such that no air is trapped during immersion of the assemblies into cleaning solutions or molten zinc.
ASTM A / AM – 17 Standard Practice for Providing High-Quality Zinc Coatings (Hot-Dip)
Moving parts such as handles or hinges should be galvanized separately and assembled after galvanizing. All markings shall remain legible after galvanizing.
When an assembly of steel parts or an individual steel part has been designed and fabricated with critical dimensions and must be subsequently wstm galvanized, the designer should be aware that the hot-dip galvanizing process chemical cleaning to prepare the surfaces for coating and this may alter the critical dimensions. This abstract is a brief summary of the referenced standard.
ASTM-A | Ahmed Negm –
It is informational only and not astmm official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Inch-pound units and SI units are not necessarily exact equivalents. Within the text of this specification and where appropriate, SI units are shown in brackets.
Each system shall be used independently of the other without combining values in any way. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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