Detail of GB/T 44154-2024

Introduction of GB/T 44154-2024

GB/T 44154-2024 Metallic and other inorganic coatings - Requirements for the designation of metallic and inorganic coatings WARNING - This document calls for the use of substances and/or procedures that can be injurious to health, if adequate safety measures are not taken. This document does not address any health hazards, safety or environmental matters and legislations associated with its use. It is the responsibility of the user of this document to establish appropriate health, safety and environmentally acceptable practices and take appropriate action to comply with any national, regional and/or International regulations. Compliance with this document does not mean exemption from legal obligations. 1 Scope This document specifies the designation requirements of metallic and other inorganic coatings in order to develop consistent technical standards and establishes a standard format for designating the coatings. It applies to electrodeposited, autocatalytic and vapour-deposited coatings. Detailed technical requirements for individual coatings are not given in this document, but can be found in the standards listed in the Bibliography. This document does not apply to thermally sprayed and porcelain enamel coatings. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 9587 Metallic and other inorganic coatings - Pretreatment of iron or steel to reduce the risk of hydrogen embrittlement Note: GB/T 19349-2012 Metallic and other inorganic coatings - Pretreatment of iron or steel to reduce the risk of hydrogen embrittlement (ISO 9587:2007, IDT) ISO 9588 Metallic and other inorganic coatings - Post-coating treatments of iron or steel to reduce the risk of hydrogen embrittlement Note: GB/T19350-2012 Metallic and other inorganic coatings - Post-coating treatments of iron or steel to reduce the risk of hydrogen embrittlement (ISO 9588:2007, IDT) 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: - IEC Electropedia: available at http://www.electropedia.org/ - ISO Online browsing platform: available at http://www.iso.org/obp 4 Information to be supplied to the supplier by the purchaser 4.1 Essential information The purchaser shall provide the essential information requested in this sub-clause, in writing, as part of the contract, purchase order, detailed product specification and/or on engineering drawings. The essential information shall include the following items with cross-references, in parentheses, to the clauses and sub-clauses that provide further details about the requirements and test methods: a) the number of this document and the designation as specified in this document (see Clause 5); b) the significant surface indicated by drawings or by suitably marked specimens; c) the nature, condition and finish of the basis material, if they affect serviceability and/or the appearance of the coating; d) the tensile strength of the component to enable possible de-embrittlement requirements to be taken into account; e) the requirements for heat treatment before and/or after coating, if the requirements are not in accordance with ISO 9587 or ISO 9588. 4.2 Additional information Additional information, not included in 4.1, that may be required for a specific coating, product or application, may include, for example, a) the appearance required, for example, bright, dull, colour, preferably with samples of the required finish; b) the accepted position(s) on the surface for unavoidable defects, such as jigs, contact marks or areas in which it is permitted for the coating to be absent; c) the standards for determining that thickness, corrosion resistance, adhesion, porosity or other requirements have been met; d) sampling methods, acceptance levels and inspection requirements for quality control purposes; e) extra information, for example, packaging or handling instructions or a delivery address shall be included where relevant. 5 Designation 5.1 General 5.1.1 Designation specification Symbols for designating metallic and other inorganic coatings shall be applied, as specified in Annex A. The designation shall comprise the following: a) description and document number in accordance with 5.1.2; b) a hyphen; c) the individual item module in accordance with 5.1.3; d) a solidus; e) the additional applicable codes separated by solidi for every stage of the coating sequence in the order of application (see 5.3). Double separators shall be used to indicate any missing stages (i.e. when a particular stage is not required). Note: Allowed composition and purity tolerances for the values shown in the designation are specified in the standards for the coatings to which they are applicable. The purchaser should be guided in their choice of designation by the severity of service conditions to be withstood by the coating. See Annex B for examples. 5.1.2 Description and document number modules The description module briefly describes the designated coating: a) electrodeposited coating; b) autocatalytic coating; c) vapour-deposited coating. The description module shall be followed by the number of the document of the particular coating that is being designated; for example, GB/T 9797, GB/T 9799, GB/T 13913, etc. The identity set is comprised of the document number module plus the individual item module, both being essential for designating coating requirements.

Contents of GB/T 44154-2024