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GB/T 34626.2-2017: Metallic and other inorganic coatings -- Cleaning and preparation of metal surfaces -- Part 2: Non-ferrous metal and alloys
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Metallic and other inorganic coatings -- Cleaning and preparation of metal surfaces -- Part 2: Non-ferrous metal and alloys
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GB/T 34626.2-2017
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Basic data | Standard ID | GB/T 34626.2-2017 (GB/T34626.2-2017) | | Description (Translated English) | Metallic and other inorganic coatings -- Cleaning and preparation of metal surfaces -- Part 2: Non-ferrous metal and alloys | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A29 | | Classification of International Standard | 20.220.10; 25.220.40 | | Word Count Estimation | 42,438 | | Date of Issue | 2017-09-29 | | Date of Implementation | 2018-04-01 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 34626.2-2017: Metallic and other inorganic coatings -- Cleaning and preparation of metal surfaces -- Part 2: Non-ferrous metal and alloys
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Metallic and other inorganic coatings - Cleaning and preparation of metal surfaces - Part 2. Non-ferrous metal and alloys
ICS 20.220.10; 25.220.40
A29
National Standards of People's Republic of China
Metal and other inorganic coatings
Cleaning and preparation of metal surfaces
Part 2. Non-ferrous metals and their alloys
metalsurfaces-Part 2.Non-ferrousmetalandaloys
(ISO 27831-2.2008, MOD)
2017-09-29 Posted
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Foreword V.
Introduction Ⅵ
1 Scope 1
2 Normative references 2
3 Terms and definitions 2
4 the buyer should provide the necessary information to the processor 2
5 Requirements 3
6 standard cleaning method 4
7 non-corrosion-resistant steel, cast iron and pure iron 4
8 corrosion-resistant steel and heat-resistant steel 4
9 powder coating before the metal pre-treatment 4
10 cleaning and preparation process 4
11 aluminum and aluminum alloy 5
11.1 Overview 5
11.2 Conventional degreasing and cleaning 5
11.3 Removal of corrosion products 5
11.4 Preparation before anodization 5
11.5 to remove oxide or film preparation before processing 5
11.6 non-anodized workpiece preparation before bonding 5
11.7 Preparation before plating 5
11.8 Electroless Nickel Preparation 6
11.9 Preparation before conversion film 6
11.10 Metal Preparation before spraying 6
11.11 Preparation of glaze porcelain before coating 6
11.12 Preparation of Physical Vapor Deposition Aluminum Auxiliary Treatment 6
12 copper and copper alloy 6
12.1 Conventional Degreasing and Cleaning 6
12.2 Preparation before plating 7
12.3 Electroless Nickel Preparation 7
12.4 Hot Tinning (TRI Treatment) [2] Before Preparation 7
12.5 Glassy tin before preparation 7
13 nickel alloy 8
13.1 Conventional degreasing and cleaning 8
13.2 Preparation before plating 8
13.3 Electroless Nickel Preparation 8
13.4 glaze porcelain preparation before coating 8
14 titanium and titanium alloy 9
14.1 Conventional Degreasing and Cleaning 9
14.2 Preparation before plating 9
14.3 Electroless nickel preparation before plating 9
15 manganese alloy 9
15.1 Conventional Degreasing and Cleaning Before Plating and Conversion 9
15.2 Preparation before plating 9
15.3 Preparing for Conversion 10
16 zinc alloy 11
16.1 Conventional degreasing and cleaning 11
16.2 Corrosion parts cleaning 11
16.3 Preparation of zinc alloy die-casting before plating 11
16.4 Preparation of zinc alloy castings before chromium conversion or phosphating 11
17 tin and tin alloy 11
18 tungsten alloy 11
18.1 Preparation before plating 11
18.2 Preparation before bonding 12
19 lead and lead alloy 12
Galvanized, cadmium, chromium and gold workpieces
20.1 Preparation of galvanized parts before chromium conversion 12
20.2 Preparation of cadmium plated workpiece before conversion to chromium 12
20.3 Preparation of Physical Vapor Deposition of Cadmium Auxiliary Processes 12
20.4 Preparation of chrome-plated parts before auxiliary treatment 12
20.5 gold plating surface contaminants removal [4] 12
Preparation of metal before powder coating 12
21.1 Pre-treatment of aluminum before powder coating 12
21.2 Preparation of Galvanized and Hot-Dip Galvanized Steel Before Powder Coating 12
21.3 Preparation of copper and brass before powder coating 13
22 cleaning and preparation process (according to the order of Chapter 10 of GB/T 34626.1-2017) 13
22.1 Process A --- organic solvent degreasing and cleaning 13
22.2 Process B --- alkaline degreasing 14
22.3 C --- acidic emulsion cleaning process 15
22.4 Process D --- Mechanical Cleaning 15
22.5 Process E --- caustic soda descaling
22.6 Technology F --- non-electrolytic pickling 16
22.7 Process G --- pickling 16
22.8 Process H --- Anodic pickling 16
22.9 Process J --- acid rust 16
22.10 Process K --- alkali rust 16
22.11 Process L --- Chemical leveling and electrolytic polishing of steel 16
22.12 Process M --- corrosion-resistant steel surface passivation, decontamination and preparation before plating 17
22.13 Process N --- aluminum pickling 17
22.14 Process O --- aluminum and aluminum oxide, such as "etching" 18
22.15 Process P --- removal of aluminum and aluminum alloy corrosion, etching, chemical polishing, electrolytic brightening and electrolytic polishing 19
22.16 Process Q --- copper and copper alloy cleaning 21
22.17 Processes - Acid descaling, etching, chemical smoothing and electrolytic polishing of copper and copper alloys 21
22.18 Process S --- pickling of titanium and titanium alloys 22
22.19 Process T --- pickling, chemical polishing and electrolytic polishing of nickel and nickel alloys 22
22.20 Process U --- tin alloy preparation before plating 23
22.21 Process V --- removal of gold plating surface contaminants 23
22.22 Process W --- Preparation of aluminum alloy plating 23
22.23 Process X --- Preparation of nickel alloy plating 24
22.24 Process Y --- Preparation of titanium alloy plating 24
22.25 Process Z --- zinc and zinc alloy preparation before plating 26
Appendix A (Informative) Organic solvents and steam degreasing bath maintenance 27
Appendix B (Normative) Vapor cleaning tank acidity control 28
Appendix C (Normative) Determination of readily oxidizable substances in sulfuric acid 29
Appendix D (Informative) Free acidity measurement method 30
Appendix E (Normative) According to the tensile strength of steel select galvanized parts chromium cleaning before conversion 31
Appendix F (Informative) Method
References 34
Foreword
GB/T 34626 "metal and other inorganic coating surface cleaning and preparation" is divided into two parts.
--- Part 1. Steel and its alloys;
--- Part 2. Non-ferrous metals and their alloys.
This section GB/T 34626 Part 2.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section uses redrafted law revision using ISO 27831-2.2008 "Metal and other inorganic surface coating metal cleaning and
Prepare part 2. Non-ferrous metals and their alloys. "
This section compared with ISO 27831-2.2008, the main differences and the reasons are as follows.
--- On normative references, this standard made a technical difference with the adjustment to adapt to China's technical conditions, adjust the situation
Concentration reflected in the second chapter "Normative references", the specific adjustments are as follows.
Replace ISO 2080 with GB/T 3138 equivalent to international standards (see Chapter 3);
Replace ISO 2064 with GB/T 12334 equivalent to international standards (see Chapter 3);
Use GB/T 13913 equivalent to international standards instead of ISO 4527 (see 11.8);
Use equivalent to international standards GB/T 19349 instead of ISO 9587 (see 7.1.2);
Use GB/T 19350 equivalent to the international standard instead of ISO 9588 (see 20.1);
Replace ISO 10074 with GB/T 19822 equivalent to international standards (see 11.4);
Use equivalent to international standards GB/T 31566 instead of ISO (see 11.12);
GB/T 34626-1.2017 modified to adopt international standards instead of ISO 27831-1.2008.
This part is proposed by China Machinery Industry Federation.
This part of the National Metal and Nonmetallic Coating Standardization Technical Committee (SAC/TC57) centralized.
This part of the drafting unit. Wuhan Institute of Materials Protection, COSCO rare earth New Materials Co., Ltd., Zhaoqing College, Guangzhou City, VW five
Gold Co., Ltd., Shandong Taifeng Cleaning Technology Co., Ltd., Dongying Yellow River Delta Standard Technical Service Center, Shenzhen Green constant low-carbon development
Promotion Center.
The main drafters of this section. Zhang Dezhong, Jia Jianxin, Xu Guanglin, Zhong Ping, Chen Ying, Liu Jinrong, Xu Guishun, Geng Jianchao, Xu Licai.
Introduction
The adhesion of the coating depends on the effect of degreasing and cleaning of the substrate surface. For plating (coating), it is necessary to remove the manufacturing process
The resulting grease, oil, dirt, or other forms of contaminants formed as a result of corrosion/erosion during storage and use to obtain a non-corrosive, clean,
Chemically active surface.
Surface contaminants may be.
--- Steel and non-ferrous metal castings on the corrosion products, sand or mold release agent;
--- Corrosion products and scale (such as hot rolled steel, steel beams, etc.) (for the substrate, the crushed scale is the cathode);
--- Oil on the cold-rolled steel and rolling lubricant;
--- Rolling aluminum rolling lubricant;
--- Hot-dip galvanized steel, steel/bracket in the transport or storage process of corrosion products;
--- Storage and handling of other pollutants generated in the process.
It is well known that plating/coating the surface of these materials is difficult.
There are many ways to remove surface contaminants, among other factors, depending on the type and level of pollutants
The size and shape of the body, the cleanliness requirements, the availability of the necessary facilities, the cost of the treatment and its impact on the environment,
Process characteristics.
GB/T 34626 listed cleaning methods, covering the mechanical method (this method to achieve the lowest degree of cleanliness), chemical and ultrasonic methods (
To achieve relatively high cleanliness) and glow discharge plasma treatment (sputter cleaning) of the substrate before vapor deposition.
GB/T 34626 lists the coating (coated) with or without coating the coating layer, the metal and its alloys cleaning practical method.
The cleaning process given in GB/T 34626.1 and GB/T 34626.2 is only the most commonly practiced method in practice. However, many solutions do
Square programs and special handling methods are not included in GB/T 34626.1 and GB/T 34626.2. This standard references these as much as possible
Special treatment method For reference GB/T 34626 parts given in other treatment processes, refer to the standard parts of the reference
Listed publications.
GB/T 34626.1 applies to steel and its alloys, and GB/T 34626.2 applies to non-ferrous metals and alloys. In order to make as much as possible
GB/T 34626.2 as a separate standard document to use, GB/T 34626.1 chapters 1 to 6 are contained in GB/T 34626.2
, Also Chapter 1 to Chapter 6, other terms according to the order of GB/T 34626.1 numbering. In addition, some of GB/T 34626.1 for steel
Material cleaning and preparation process can also be applied to non-ferrous metal materials, therefore, these cleaning and preparation process also according to GB/T 34626.1 Shun
Sort and use the same name.
Metal and other inorganic coatings
Cleaning and preparation of metal surfaces
Part 2. Non-ferrous metals and their alloys
Warning --- GB/T 34626 this part requires the use of some of the substances and processes, if you do not take appropriate measures, health products
Health hazards. This section does not discuss any health hazards, safety or environmental issues and regulations involved in the use of the standard. Producer, buy
Party and standard users are responsible for establishing appropriate health, safety and environmental regulations and taking appropriate measures to bring them in line with national, local and /
International regulations and rules. Compliance with this section does not imply a legal exemption.
1 Scope
GB/T 34626 provisions of this part of the non-ferrous metals and their alloys surface cleaning process.
This section applies to remove any irrelevant or undesirable sediments and other pollutants generated during the production, storage and use,
And for the metal surface to prepare for the next step.
This section does not apply to the initial accumulation of oil, grease and dirt and other heavy deposits during the initial cleaning operation, preparation before welding or electrical contact
Clean the point. However, the user can determine whether many of the processes in GB/T 34626 can be used for these cleaning.
This section covers the process is plated (coating) the following coating before the required metal surface preparation.
--- Electroplating metal layer;
--- Autocatalytic metallization (autocatalytic and replacement);
--- Conversion film;
--- Anodized film;
--- Hot dip coating;
--- Metal spray coating;
--- Glaze porcelain coating;
--- physical vapor deposition of aluminum and cadmium layer;
--- Powder coating.
This section describes the following process.
--- Degreasing
--- descaling
--- pickling;
--- Etching;
--- Rust
--- Chemical leveling;
--- Chemical polishing;
--- electrolytic brightening
---Electrolytic polishing;
--- Anode fluoride treatment (manganese alloy used when cleaning).
The process described above applies to the following metals.
--- Aluminum and aluminum alloy;
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