Metallic coatings — Decorative multicolours composite electyoplated coatings
Some standard content:
ICS25.220.40
Machinery Industry Standard of the People's Republic of China
JB/T10241-2001
Metallic coatings
Decorative multicolourscompositeelectroplatedcoatings2001-05-23 Issued
China Machinery Industry Federation
2001-10-01 Implementation
JB/T10241—2001
This standard is proposed and managed by the National Technical Committee for Standardization of Metallic and Non-metallic Coatings. The responsible drafting units of this standard are: Wuhan Materials Protection Research Institute, Guangdong Dongguan Xiaobian Jinhui Electroplating Factory. The main drafters of this standard are: Fu Zhiyong, Xie Ruibing, Lin Yunfeng, Xu Bangyi, Zhang Hua. This standard is issued for the first time.
Standard of the Machinery Industry of the People's Republic of China
Metallic coatings-Decorativemulficolourscomposite electroplated coatings
Metallic coatings-Decorativemulficolourscomposite electroplated coatingsJB/T10241—2001
Decorativemulficolourscomposite electroplated coatings belong to a composite of multiple coatings, which are usually composed of a thin impact coating (such as impact copper plating, impact nickel plating, etc.) to enhance the bonding between the substrate and the coating, an intermediate thickened coating that provides good corrosion resistance and leveling gloss, and a surface coloring electroplating layer with rich and diverse colors, plus a transparent varnish layer that resists discoloration and pollution. 1 Scope
This standard specifies the technical requirements, test methods, inspection rules and packaging and storage for electroplating decorativemulficolourscomposite electroplated coatings on substrates suitable for electroplating, such as steel, zinc alloy, copper and copper alloy, aluminum and aluminum alloy, ABS plastic, etc. This standard applies to color combination electroplating layers for decorative purposes in indoor environments. This standard does not apply to colored single-layer metal plating layers for other functional purposes, nor does it apply to colored coatings applied on electroplating layers (such as gold substitute glue, gold electrophoretic paint and other colored coatings). 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 1720—1979
GB/T3138—1995
GB/T4955—1997
GB/T 5270—1985
GB/T6462—1986
GB/T 6739—1996
GB/T101251997
GB/T12609—1990
GB/T13911—1992
JB/T6073—1992
3 Definitions
Determination of adhesion of paint films
Terms of metal coating and chemical treatment and related processes (ngISO2079:1981)Metallic coatingsCoulometric method for coating thickness by anodic dissolution (idtISO2177:1985)Metallic coatings (electrodeposited and chemically deposited) on metal substratesAdhesion Review of strength test methods (eqvISO2819:1980)
Microscopic measurement method of cross-sectional thickness of metal and oxide coatings (eqvISO1463:1982) Pencil method for determination of coating hardness
Corrosion test in artificial atmosphere Salt spray test (eqvISO9227:1990) Count sampling procedure for electrodeposited metal coatings and related finishes (eqyISO4519:1980) Expression method for metal plating and chemical treatment
Laboratory full immersion corrosion test for metal coatings This standard adopts the definitions in GB/T3138 and the following definitions. Approved by China Machinery Industry Federation on May 23, 2001, implemented on October 1, 2001
JB/T10241-2001
3.1 Surface electroplated coating for colour control A metal or alloy coating that can show color and is thinner by electroplating or chemical treatment after electroplating on the surface of a metal coating, or a surface electroplated coating with more varied color and pattern after brushing and polishing. 3.2 Electroplated coating of single metallic layer A coating composed of a single metal or alloy. 3.3 Coating of strike plating A coating obtained by electroplating in a specific solution by depositing a thin metal layer at a high current density for a short time to improve the bonding force between the subsequently deposited coating and the substrate.
3.4 Multi-color composite electroplated coating Multi-electroplated coating system consisting of a thin impact coating, an intermediate thickened coating, a surface color-tuned electroplated layer and/or a thin transparent varnish layer. 3.5 Brushing and brushing
A method of purposefully polishing the surface with a tool made of fiber to adjust the color tone of the electroplated layer. By adjusting the intensity, depth and brushing texture of the brush, the exposed area ratio of the surface color-tuned electroplated layer and the depth and texture direction of the surface color can be changed. 4 Information that the purchaser should provide to the supplier
4.1 Standard number of this standard.
4.2 Appearance requirements, such as color tone. The purchaser can also provide samples that can indicate the appearance requirements. 4.3 The main surface should be indicated on the workpiece drawing or indicated by a sample with appropriate markings. The position of the inevitable fixture marks on the main surface should also be indicated.
5 Classification and representation method
The classification symbols in Table 1 are arranged in the following order. Base material
Impact plating·Intermediate plating (thickness)
, coloring layer (surface color)
Combined electroplating classification representation symbols
Materials of each combined unit and types of plating and coating Iron, steel
Copper and copper alloys
Base material
Impact plating
Intermediate plating
(thickness)
Aluminum and aluminum alloys
Zinc alloy
ABS plastic
Impact copper plating
Impact nickel plating
|Copper plating (thickness)
Copper-tin alloy plating (thickness)
Nickel plating (thickness)
Copper plus nickel plating (thickness)
Symbol
aui (thickness)
Cu-Sn (thickness)
Ni (thickness)
CutNi (thickness)
Brushing
Additional instructions
Clear varnish
Other material substrates are represented by the material symbol. Other intermediate plating layers are represented by the element symbol of the plating metal. The number in () after it represents the total thickness of the intermediate plating layer, in um. For a single intermediate layer, it is the single layer thickness; for a multi-layer electroplated layer, it is the total thickness of each combined unit
Coloring layer
(Surface color
Brushing
Clear varnish
Material and plating, coating category
White and imitation white plating
Gold and imitation gold plating
Antique plating
Black and imitation black plating
Bright varnish
Matt varnish
JB/T10241—2001
Table 1 (end)
Symbol
Additional instructions
Such as: Cr (WHD, Ni-Co (stainless steel color), Ni (pearl color), Cu-Sn (WH) , Rh(WH)Ag(SR)
Use the plating metal element
symbol, followed by ()
fill in the color code or
color name
such as: Au (24K gold), Cu-Sn (imitation 18K gold) such as: Cu-Zn (yellow bronze), Cur-Zn (green bronze), Cu (red bronze), Cu-Sn-Zn (brown bronze), Ag (antique silver), Aul (antique gold), Sn (antique tin)
such as: Sn-Ni (BK), Ru (BK), Cr (BK), Sn-Ni-Cu (black pearl color)
If this process is not required, it can be omitted
This process can be sprayed, dipped or electroplated Swimming to obtain a thin and transparent paint film that prevents the coating from discoloration, resists fingerprints and stains, and has no effect on the color tone. Note: The color code can be found in Table 7 of GB/T13911-1992. Colors not in the table can be represented by color specific names. Color specific names are commonly used expressions, such as "... color", "imitation color", "bronze color" and "antique color". Example 1: Al/CuCu (10) Cu (red bronze color) BbV means that after the aluminum substrate is impact-plated with copper as the base, a 10um copper layer is plated, a red bronze coating is plated, and then a bright varnish is applied after brushing. Example 2: ABS/CukCu+Ni (6) Cu-Zn (imitation gold) BbFV means that after the ABS plastic substrate is impact-plated with copper as the base, a copper layer with a total thickness of 6um is plated. Nickel coating, copper-zinc imitation gold coating, brushed and coated with matte varnish.
Example 3: Zn/CukCu+Ni（8）Ag（Ancient Silver）BbV indicates that the zinc alloy substrate is impact-plated with copper as the base, and then the copper and nickel coating with a total thickness of 8um is plated, and the antique silver coating is plated, brushed and coated with bright varnish.
6 Performance requirements and test methods
6.1 Appearance
There should be no obvious coating defects on the main surface of the plated parts, such as blistering, pores, roughness, cracks, missing plating, darkening or discoloration. The coating appearance color should be uniform, and the color tone of the whole batch of products should be consistent. Bright coating should have good gloss and bright colors, while matte coating should have uniform brightness and rich colors. The brushed coating should have uniform silk texture and natural and consistent texture transition. The brightness of the secondary surface can be slightly worse, but there should be no missing plating. The specific degree of allowable defects should be agreed upon by both parties. The position of the inevitable hanger marks on the main surface shall be specified by the purchaser. The bright or matt colorless transparent varnish layer sprayed, dipped or electrophoresed on the plated parts shall not have sagging, missing coating, pinholes, shrinkage wrinkles and adhered foreign matter.
6.2 Thickness
The thickness shall be measured by the coulometric method specified in GB/T4955 or the metallographic microscope method specified in GBT6462. The thickness of the combined coating shall be agreed upon by the supplier and the purchaser, but the minimum thickness shall not be less than 6um. 6.3 Corrosion resistance
6.3.1 Neutral salt spray test
JB/T10241—2001
The test shall be carried out in accordance with the neutral salt spray test requirements in GB/T10125, using 24h continuous spraying. The test shall be carried out once every 8h and 24h after the start of the test to observe the changes in the surface of the sample. The time for discoloration and corrosion signs to begin to appear on the surface of the plated parts shall be no less than 24h. 6.3.2 Salt water immersion test
Test according to the method in JB/T6073, immerse the sample in 3.5% (w.) sodium chloride (chemically pure) solution at 25℃±1℃, the pH value of the solution is 6.7~7.2, and the time for the coating surface to begin to change color should be no less than 48h. 6.4 Bonding strength
Perform the thermal shock test according to GB/T5270. When the substrate is ABS plastic, the thermal shock test temperature is controlled at 80℃ for 1h, and then placed in 15℃ water. This cycle is repeated 3 times and the coating surface shall not bubble or peel off. The bonding strength of the coating on other non-metallic material substrates shall be agreed upon by the supply and demand parties.
6.5 Paint film hardness
Test according to the method in GB/T6739, the paint film pencil hardness shall not be less than 4H. When the substrate is ABS plastic, the paint film pencil hardness shall be agreed upon by the supply and demand parties.
6.6 Paint film adhesion
The paint film adhesion shall be not less than Grade 1 according to the round rolling line scratch method in GB/T1720. 7 Sampling inspection
Sampling shall be carried out according to the sampling method specified in GB/T12609. The appearance shall be inspected and accepted based on the samples provided by the purchaser or the samples provided by the supplier and approved by the purchaser. Appearance and thickness are mandatory inspection items for each batch. Neutral salt spray test and other inspection items shall be carried out according to the requirements of the purchaser, or regular sampling shall be carried out.
8 Packaging and storage
The product shall be packed with soft packaging materials. Store in a dry environment, away from corrosive atmosphere and fire sources, and avoid direct sunlight. 4
Mechanical Industry Standard
Metal Covering
Decorative Multi-color Combination Electroplating
JB/T10241-2001
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Format 880×12301/16 Printing Sheet 1/2
2Number of Words 10000
First Edition July 2001
First Printing July 2001
Printing Quantity 1-500
Price 1000 Yuan
No. 2001-052
Mechanical Industry Standard Service Network: http:/hvwwJB.ac.cn11 Appearance
There should be no obvious coating defects on the main surface of the plated part, such as blistering, pores, roughness, cracks, missing plating, darkening or discoloration. The coating appearance color should be uniform, and the color tone of the whole batch of products should be consistent. Bright coating should have good gloss and bright colors, while matte coating should have uniform brightness, moderate brightness and rich colors. The brushed coating should have uniform silk texture and natural and consistent texture transition. The brightness of the secondary surface can be slightly worse, but there should be no missing plating. The specific allowable defect level should be agreed upon by both parties. The position of the inevitable hanger marks on the main surface should be specified by the purchaser. The bright or matte colorless and transparent varnish layer sprayed, dipped or electrophoresed on the plated part should not have sagging, missing coating, pinholes, shrinkage wrinkles and adhered foreign matter.
6.2 Thickness
The thickness is measured by the coulometric method specified in GB/T4955 or the metallographic microscope method specified in GBT6462. The thickness of the combined coating shall be agreed upon by both the supplier and the buyer, but the minimum thickness shall not be less than 6um. 6.3 Corrosion resistance
6.3.1 Neutral salt spray test
JB/T10241—2001
Test according to the neutral salt spray test requirements in GB/T10125, using 24h continuous spray, unpack and inspect once 8h and 24h after the start of the test, and observe the changes on the surface of the sample. The time for discoloration and corrosion signs to begin to appear on the surface of the plated part shall be no less than 24h. 6.3.2 Salt water immersion test
Test according to the method in JB/T6073, immerse the sample in a 3.5% (w.) sodium chloride (chemically pure) solution at 25℃±1℃, the pH value of the solution is 6.7~7.2, and the time for discoloration on the surface of the coating shall be no less than 48h. 6.4 Bonding strength
Perform the thermal shock test in GB/T5270. When the substrate is ABS plastic, the thermal shock test temperature is controlled at 80℃ for 1h, and then placed in 15℃ water. This cycle is repeated 3 times without blistering or peeling of the coating surface. The bonding strength of the coating on other non-metallic substrates shall be agreed upon by the supplier and the buyer.
6.5 Paint film hardness
Tested according to the method of GB/T6739, the paint film pencil hardness shall not be less than 4H. When the substrate is ABS plastic, the paint film pencil hardness shall be agreed upon by the supplier and the buyer.
6.6 Paint film adhesion
Measured according to the round rolling line scratch method in GB/T1720, the paint film adhesion shall not be less than level 1. 7 Sampling inspection
Sampling shall be carried out according to the sampling method specified in GB/T12609. The appearance shall be accepted based on the sample provided by the buyer or the sample provided by the supplier and approved by the buyer as a reference. Appearance and thickness are mandatory inspection items for each batch. Neutral salt spray test and other inspection items are carried out according to the requirements of the purchaser, or regular sampling is carried out.
8 Packaging and storage
The product is packed with soft packaging materials. Store in a dry environment, away from corrosive atmosphere and fire source, and avoid direct sunlight. 4
Mechanical Industry Standard
Metal Covering
Decorative Multi-color Combination Electroplating
JB/T10241-2001
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Format 880×12301/16 Printing Sheet 1/2wwW.bzxz.Net
2Number of Words 10000
First Edition July 2001
First Printing July 2001
Printing Quantity 1-500
Price 1000 Yuan
No. 2001-052
Mechanical Industry Standard Service Network: http:/hvwwJB.ac.cn11 Appearance
There should be no obvious coating defects on the main surface of the plated part, such as blistering, pores, roughness, cracks, missing plating, darkening or discoloration. The coating appearance color should be uniform, and the color tone of the whole batch of products should be consistent. Bright coating should have good gloss and bright colors, while matte coating should have uniform brightness, moderate brightness and rich colors. The brushed coating should have uniform silk texture and natural and consistent texture transition. The brightness of the secondary surface can be slightly worse, but there should be no missing plating. The specific allowable defect level should be agreed upon by both parties. The position of the inevitable hanger marks on the main surface should be specified by the purchaser. The bright or matte colorless and transparent varnish layer sprayed, dipped or electrophoresed on the plated part should not have sagging, missing coating, pinholes, shrinkage wrinkles and adhered foreign matter.
6.2 Thickness
The thickness is measured by the coulometric method specified in GB/T4955 or the metallographic microscope method specified in GBT6462. The thickness of the combined coating shall be agreed upon by both the supplier and the buyer, but the minimum thickness shall not be less than 6um. 6.3 Corrosion resistance
6.3.1 Neutral salt spray test
JB/T10241—2001
Test according to the neutral salt spray test requirements in GB/T10125, using 24h continuous spray, unpack and inspect once 8h and 24h after the start of the test, and observe the changes on the surface of the sample. The time for discoloration and corrosion signs to begin to appear on the surface of the plated part shall be no less than 24h. 6.3.2 Salt water immersion test
Test according to the method in JB/T6073, immerse the sample in a 3.5% (w.) sodium chloride (chemically pure) solution at 25℃±1℃, the pH value of the solution is 6.7~7.2, and the time for discoloration on the surface of the coating shall be no less than 48h. 6.4 Bonding strength
Perform the thermal shock test in GB/T5270. When the substrate is ABS plastic, the thermal shock test temperature is controlled at 80℃ for 1h, and then placed in 15℃ water. This cycle is repeated 3 times without blistering or peeling of the coating surface. The bonding strength of the coating on other non-metallic substrates shall be agreed upon by the supplier and the buyer.
6.5 Paint film hardness
Tested according to the method of GB/T6739, the paint film pencil hardness shall not be less than 4H. When the substrate is ABS plastic, the paint film pencil hardness shall be agreed upon by the supplier and the buyer.
6.6 Paint film adhesion
Measured according to the round rolling line scratch method in GB/T1720, the paint film adhesion shall not be less than level 1. 7 Sampling inspection
Sampling shall be carried out according to the sampling method specified in GB/T12609. The appearance shall be accepted based on the sample provided by the buyer or the sample provided by the supplier and approved by the buyer as a reference. Appearance and thickness are mandatory inspection items for each batch. Neutral salt spray test and other inspection items are carried out according to the requirements of the purchaser, or regular sampling is carried out.
8 Packaging and storage
The product is packed with soft packaging materials. Store in a dry environment, away from corrosive atmosphere and fire source, and avoid direct sunlight. 4
Mechanical Industry Standard
Metal Covering
Decorative Multi-color Combination Electroplating
JB/T10241-2001
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Format 880×12301/16 Printing Sheet 1/2
2Number of Words 10000
First Edition July 2001
First Printing July 2001
Printing Quantity 1-500
Price 1000 Yuan
No. 2001-052
Mechanical Industry Standard Service Network: http:/hvwwJB.ac.cn1
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