25.220.40 标准查询与下载



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1.1 This test method covers a test for the quality of seal of porous anodic coatings on aluminum and its alloys. It is based upon the loss in mass of the coating after immersion in a warm phosphoric-chromic acid solution. 1.2 This test method is applicable to anodic coatings intended for exposure to the weather, or for protective purposes in corrosive media, and where resistance to staining is important. 1.3 This test method is not applicable to: 1.3.1 Hard coatings, which normally are not sealed. 1.3.2 Anodic coatings that have been sealed only in dichromate solutions. 1.3.3 Anodic coatings that have undergone a treatment to render them hydrophobic. 1.4 The values stated in SI units are to be regarded as 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 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.

Standard Test Method for Seal Quality of Anodic Coatings on Aluminum by Acid Dissolution

ICS
25.220.40
CCS
发布
2019-10-01
实施

1.1 This test method provides a means for measuring the average dimensions and number of corrosion sites in an electroplated decorative nickel plus chromium or copper plus nickel plus chromium coating on steel after the coating has been subjected to corrosion tests. This test method is useful for comparing the relative corrosion resistances of different electroplating systems and for comparing the relative corrosivities of different corrosive environments. The numbers and sizes of corrosion sites are related to deterioration of appearance. Penetration of the electroplated coatings leads to appearance of basis metal corrosion products. 1.2 The values stated in SI units are to be regarded as the standard. 1.3 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. 1.4 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.

Standard Test Method for Measurement of Corrosion Sites in Nickel Plus Chromium or Copper Plus Nickel Plus Chromium Electroplated Surfaces with Double-Beam Interference Microscope

ICS
25.220.40
CCS
发布
2019-10-01
实施

4 工艺要求 4.1 材料 4.1.1 基体材料 电镀前金属零部件的基体材料质量控制应符合GB/T 12611的要求。 4.1.2 工艺材料 无氰镀银层用的银阳极材料应采用纯度≥99.9%电解银,其它工艺材料、辅助材料应符合GJB 480B 中5.3的要求,工艺生产用水应符合HB 5472的要求。 4.2 工艺流程 镀前验收→装挂→预处理→无氰电镀银→后处理→检验检测→包装 4.2.1 工序说明 4.2.1.1 镀前验收 按.GB/T 12611 要求验收。 4.2.1.2 装挂 使用通用或根据零件图纸形状、 尺寸、数量及技术要求设计的专用工装装挂。 4.2.1.3 预处理 按.GB/T 12611 要求执行。如不锈钢、高温合金等需要冲击镀镍。另金属零部件电镀前需消除应力 的热处理要求按表 1 执行。 凡经机械加工、磨削、冷成形、冷拉伸、冷矫正的零(部)件,当其材料抗拉强度最大值大于或等于 1050 MPa 的钢制零件及技术文件规定的其它需要消除应力处理的零件,应按有关说明书规定进行消除 应力热处理,消除应力应在喷丸强化、喷砂、清洗和电镀前进行,确定镀前消除应力的温度,一般原则 是低于其回火温度 20~30℃。T/CSEA 7—2019 3 镀银零件若为淬火的零件,消除应力应在 130~ 150℃至少处理 5 h。如果允许基体表面的硬度降 低,也可以在较高温度下作较短时间的处理。 表1 钢件电镀前消除应力的热处理规定 零件类型 抗拉强度 (Rm, MPa) 应力消除 温度(℃) 时间(h) 钢制零件 Rm<1050 无要求 — 渗碳件或渗氮件(含回火 温度低于 200℃的钢制件) 140±10 ≥3 碳钢与低合金钢 Rm≥1050 (200±10)℃或低于其最 低回火温度 30℃ ≥4 高强度钢 1050

General specification for cyanide-free silver plating

ICS
25.220.40
CCS
C336
发布
2019-09-20
实施
2019-12-25

7 镀层要求 7.1 外观 7.1.1 镀层表面色泽、特征及状况 7.1.2 镀层表面缺陷 7.2 镀层厚度 在主要表面上凡能被直径为20㎜的球接触的部分,均应达到分级号(表1)规定最小局部厚度值, 若需方有要求,则主要表面的其它部分也应达到最小局部厚度。 注: 螺纹件的镀层厚度会受到螺纹等级及配合尺寸要求的限制。 GB5267.1规定了标准螺纹最大镀层厚度 7.3 附着强度 镀层与基体材料应结合牢固,无起皮、无起泡、无脱落等现象 7.4 耐蚀性 镀层在规定时间、周期内,且连续喷雾时间不小于规定的条件下,镀层主要表面应无白色、无灰黑 色或无黑色腐蚀产物;或基体不出现腐蚀;或按产品图样规定的试验周期数,按GB/T 6461评级达到规 定的保护等级。 7.5 镀层成份 镀层为含铁0.2%~1.0%(质量分数),余量为锌。 7.6 转化膜的应用 转化膜,特别是铬酸盐转化膜能提高锌-铁合金镀层耐蚀性,只有当需方有明确要求时,才能省去铬 酸盐转化膜,或用其它转化膜代替。电镀锌-铁合金镀层能形成转化膜类型详见GB/T 9800,锌-铁合金镀 层上的转化膜一般为彩色、黑色钝化。

Metallic coatings electroplated coatings of zinc-Iron alloys on iron or steel

ICS
25.220.40
CCS
C336
发布
2019-09-20
实施
2019-12-25

This document specifies a method for using phase-sensitive eddy-current instruments for non- destructive measurements of the thickness of non-magnetic metallic coatings on metallic and non- metallic basis materials such as: a) zinc, cadmium, copper, tin or chromium on steel; b) copper or silver on composite materials. The phase-sensitive method can be applied without thickness errors to smaller surface areas and to stronger surface curvatures than the amplitude-sensitive eddy-current method specified in ISO 2360, and is less affected by the magnetic properties of the basis material. However, the phase-sensitive method is more affected by the electrical properties of the coating materials. In this document, the term “coating” is used for materials such as, for example, paints and varnishes, electroplated coatings, enamel coatings, plastic coatings, claddings and powder coatings. This method is particularly applicable to measurements of the thickness of metallic coatings. These coatings can be non-magnetic metallic coatings on non-conductive, conductive or magnetic base materials, but also magnetic coatings on non-conductive or conductive base materials. The measurement of metallic coatings on metallic basis material works only when the product of conductivity and permeability (σ, μ) of one of the materials is at least a factor of two times the product of conductivity and permeability for the other material. Non-ferromagnetic materials have a relative permeability of one.

Non-magnetic metallic coatings on metallic and non-metallic basis materials — Measurement of coating thickness — Phase-sensitive eddy-current method

ICS
25.220.40
CCS
发布
2019-09-19
实施

Standard Practice for Locating the Thinnest Spot in a Zinc (Galvanized) Coating on Iron or Steel Articles

ICS
25.220.40
CCS
发布
2019-09-01
实施

Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ICS
25.220.40
CCS
发布
2019-09-01
实施

Standard Test Method for Weight [Mass] of Coating on Aluminum-Coated Iron or Steel Articles

ICS
25.220.40
CCS
发布
2019-05-01
实施

1.1 This practice sets forth the procedures for conducting case studies of galvanized installations. It is intended for structural members and other permanent parts of the installation, such as railings and other such fabrications. 1.2 Included in this practice are recommendations for the visual inspection of the galvanized structure, measurement of coating thickness, and reporting of results. 1.3 This specification is applicable to orders in either inch-pound units (as A896) or in SI units (as A896M). 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. 1.4 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. 1.5 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.

Standard Practice for Conducting Case Studies on Galvanized Structures

ICS
25.220.40
CCS
发布
2019-05-01
实施

1.1 This practice covers a procedure for evaluating the protective value of chemical and electrochemical conversion coatings produced by chromate treatments of zinc and cadmium surfaces. 1.2 The protective value of a chromate coating is usually determined by salt-spray test and by determining whether or not the coating possesses adequate abrasion resistance. 1.3 Other methods, such as exposure to a humidity environment, can be used, but are generally of too long a duration to be of practical value. “Steam Tests” using pressure cookers have also been used for testing chromate films on hot-dip galvanized surfaces. 1.4 The values stated in SI units are to be regarded as 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 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.

Standard Practice for Testing Chromate Coatings on Zinc and Cadmium Surfaces

ICS
25.220.40
CCS
发布
2019-04-01
实施

This document specifies requirements for the protection of iron and steel surfaces against corrosion by applying thermal-sprayed metallic coatings of zinc, aluminium or their alloys. In this document, requirements for the planning of the corrosion protection system and for the constructive design of the component to be protected are specified, where thermal spraying is intended to be the process for the deposition of the metallic corrosion protection. Some field-related basic terms are defined and instructions for corrosion behaviour of the zinc and aluminium materials under different environment conditions are provided. Characteristic properties of the coating, e.g. coating thickness, minimum adhesive strength and surface appearance, are specified and test procedures for thermal-sprayed corrosion protection coatings of zinc, aluminium or their alloys are determined. This document is valid for applying thermal-sprayed zinc and aluminium protection coatings against corrosion in the temperature range between −50 °C to +200 °C, taking into consideration the service conditions of any sealants used. Heat-resistant protective coatings of aluminium are covered by Other corrosion protection processes, e.g. hot-dip galvanizing (galvanic coating), sherardizing, electroplating or selection and deposition of organic coatings/paints are not in the scope of this document. Requirements for the manufacturing of thermal-sprayed coatings are specified in ISO 2063-2.

Thermal spraying — Zinc, aluminium and their alloys — Part 1: Design considerations and quality requirements for corrosion protection systems

ICS
25.220.40
CCS
发布
2019-02-14
实施
0000-00-00

1.1 This practice describes methods of preparing surfaces of hot-dip galvanized iron and steel for powder coating and the application of powder coating materials. 1.1.1 Powder coating is a dry finishing process which uses finely ground particles of pigment and resin, electrostatically charged, and sprayed onto a part to be coated. The parts are electrically grounded so that the charged particles projected at them adhere to the surface and are held there until melted and fused into a smooth coating in the curing oven. 1.1.2 Hot-dip galvanized iron or steel is produced by the immersion of fabricated or un-fabricated products in a bath of molten zinc, as specified in Specification A123/A123M or A153/A153M. This practice covers surface preparation and thermal pretreatment of iron and steel products and hardware which have not been painted or powder coated previously (Practice D6386). Galvanized surfaces may have been treated with protective coatings to prevent the occurrence of wet storage stain. This practice neither applies to sheet galvanized steel products nor to the coil coating or continuous roller coating processes. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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. 1.4 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.

Standard Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Powder Coating

ICS
25.220.40
CCS
发布
2019-02-01
实施

This document gives guidelines for determining the average surface density over a measured area of anodic oxide or of a coating deposited autocatalytically, mechanically, by chemical conversion, by electrodeposition, by hot dip galvanizing and by chemical or physical vapour deposition using gravimetric and other chemical analysis procedures that have attained some degree of national or international standardization. A variety of procedures are described and include: — gravimetric procedures for chemical or electrochemical dissolution of the coating or the substrate to determine the coating surface density; — gravimetric procedures for weighing the uncoated substrate and the coated (finished) specimen to determine the coating surface density; — analytical procedures that utilize dissolution of the coating for determination of the coating surface density by instrumental chemical analysis methods. With the exception of the gravimetric method as described in ISO 3892, this document does not give the measurement uncertainties of the methods cited.

Metallic and other inorganic coatings — Measurement of mass per unit area — Review of gravimetric and chemical analysis methods

ICS
25.220.40
CCS
发布
2019-01-10
实施

1.1 This specification covers material and process requirements for electrodeposited zinc coatings applied to iron or steel articles to protect them from corrosion. 1.2 This specification is not intended to provide the design activity with all the background needed to properly specify their zinc coating requirements. The users of Specification B633 are encouraged to review this specification in its entirety including the appendices, and access the supplementary papers, other standards, and published literature referenced herein and within other related references. 1.3 The coatings are provided in four standard thickness classes (4.1), in the as-plated condition or with one of five types of supplementary finishes (4.2). 1.4 High strength metals, including high strength steels having a tensile strength greater than 1700 MPa (247 ksi, 46 HRC) should not be zinc electroplated in accordance with this specification. 1.5 It does not cover continuous processes for electrodeposited zinc coated steel wire or sheets (see Specification A591/ A591M for sheets). 1.6 For zinc electroplating of mechanical fasteners, the purchaser is encouraged to consider Specification F1941/ F1941M. 1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.8 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. 1.9 This standard has been revised to address RoHS requirements that seek to limit the exposure of workers and the public from exposure to toxic metals. Additional types V and VI have been added to permit non-chromate passivate treatments to be used in replacement of hexavalent chromium. 1.10 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.

Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel

ICS
25.220.40
CCS
/
发布
2019
实施
0000-00-00

What is this standard about? This document specifies requirements for electroplated coatings of metallic chromium, with or without undercoats, on ferrous and non-ferrous metals for engineering purposes. The coating designation provides a means of specifying the thickness of chromium appropriate for typical engineering applications.

Metallic and other inorganic coatings. Electrodeposited coatings of chromium for engineering purposes

ICS
25.220.40
CCS
发布
2018-12-31
实施
2018-12-31

Standard Test Method for Measurement of Internal Stress of Metallic Coatings by Split Strip Evaluation (Deposit Stress Analyzer Method)

ICS
25.220.40
CCS
发布
2018-12-01
实施

Standard Test Method for Measurement of Internal Stress of Metallic Coatings by Split Strip Evaluation (Deposit Stress Analyzer Method)

ICS
25.220.40
CCS
发布
2018-12-01
实施

This document specifies requirements for electroplated coatings of metallic chromium, with or without undercoats, on ferrous and non-ferrous metals for engineering purposes. The coating designation provides a means of specifying the thickness of chromium appropriate for typical engineering applications.

Metallic and other inorganic coatings — Electrodeposited coatings of chromium for engineering purposes

ICS
25.220.40
CCS
发布
2018-11-08
实施

1.1 This specification covers the general requirements for protective zinc coatings (hereinafter referred to as the coatings) to be applied by the thermo-diffusion coating (TDC) method, to various products made of carbon steel, including low and high tensile parts as well as of wrought iron, iron and steel castings, sintered iron steel-powder, and various steel and stainless alloys. TDC is a dry coating process carried out by immersing the parts in a zinc or zinc alloy powder at elevated temperature for a period of time, causing a metallurgical diffusion process of zinc and iron. Further processing may be added, such as passivation, topcoat application, paint application, etc. 1.2 This specification is applicable to orders in either inch-pound units (as A1059) or in SI units (as A1059M). 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. In the case of orders in SI units, all testing and inspection shall be done using the metric equivalent of the test or inspection method as appropriate. In the case of orders in inch-pound units, such shall be stated to the applicator when the order is placed. 1.3 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. 1.4 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.

Standard Specification for Zinc Alloy Thermo-Diffusion Coatings (TDC) on Steel Fasteners, Hardware, and Other Products

ICS
25.220.40
CCS
发布
2018-11-01
实施

Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ICS
25.220.40
CCS
发布
2018-11-01
实施



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