Manufacturer, importer, exporter of all types of industrial chemicals (such as PCB, Electronic part, Semiconductor, etc.)
and provide all types of surface treatment technical services.
Blackening
Melblack BR-1560（Blackening for plating of copper alloy） |
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Melblack BR-1560 is a black oxide for copper and copper alloy (containing 65 - 90% of copper). |
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Although Melblack BR-1560 can black oxide by itself, it is more effective to use Melblack BR-1560 as the activating agent in advance of blackening process for low copper content alloy such as brass with Melblack CU-1565. |
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Black oxide coatings are crystal of the fine velvet copper oxide and excel as base of painting and paintwork of high adhesion is obtained. |
Bath composition and Operating conditions |
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Equipment |
● Tank : Use steel, stainless or titanium tank. Do not use soldered steel.
● Heater : Gas, Stainless corrugated tub. Gas heating is usually the most economical.
● Others : Install exhaust equipment
Precaution |
● Operating bath is irritant and strong alkaline
Melblack CU-1565（Blackening for copper and copper alloy） |
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Black oxide coatings are black color, chemically stable and can tolerate high temperature of 200℃. |
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Melblack CU-1565 produces copper oxide coating. Corrosion resistance and adhesion are excellent compared with sulfuration or Nickel treatment. |
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Black oxide coatings are crystal of the fine velvet copper oxide and excel as base of painting and paintwork of high adhesion is obtained. |
Bath composition and Operating conditions |
|
|
Equipment |
● Tank : Use steel, stainless or titanium tank. Do not use soldered steel.
● Heater : Gas, Stainless corrugated tube. Gas heating is usually the most economical.
● Others : Install exhaust equipment.
Precaution |
● Operating bath is irritant and strong alkaline.
Melblack S-1531（Blackening Process for Steel）
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Easily produces a beautiful glossy black film compared to general blackening agents. |
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Excellent adhesion and corrosion resistance. |
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Produces 1.5 to 2.5 µm thick oxide film. |
Bath composition and Operating conditions |
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Equipment |
Do not contact Melblack S-1531 to metal other than steel and stainless.
● Tank : Use steel tank. Don’t use soldered steel.
● Heater : Gas, Stainless corrugated tube. Gas heating is usually the most economical.
● Others : All racks and baskets must be made of welded steel. Don’t use brass and soldered steel.
Precaution |
● Operating bath is irritant and strong alkaline.
Melblack SS-1540（Blackening process for stainless steel and high alloy steel） |
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Melblack SS-1540 produces shiny black coatings on steel. |
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The dimensional changes involved in blackening are less than 0.3 μm. The thickness of the black oxide coating ranges from 1.5 to 2.5μm. |
Bath composition and Operating conditions |
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Equipment |
Don’t contact Melblack SS-1540 to metal other than steel and stainless steel.
● Tank : Use steel tank. Don’t use soldered steel.
● Heater : Gas, stainless-steel corrugated tube. Gas heating is usually the most economical.
● Others : All racks and baskets must be made of welded steel. Do not use soldered steel. Copper alloy dissolve in Melblack SS-1540 bath and dissolved copper cause smut.
Precaution |
● Operating bath is irritant and strong alkaline.
Please feel free to contact us if you have any questions or concerns about surface treatment chemicals for plating.
