Surface treatment Croston
High corrosion-resistant chrome plating, known as Croston, is a non-crack plating that does not have cracks typically found in standard chrome plating layers.
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basic information
◆◇◆Features◆◇◆ ◆Film Structure There are no cracks due to the special crystal structure. ◆Corrosion Resistance Due to the absence of cracks, the corrosion resistance is excellent. A single-layer plating of 20μm or more is expected to provide sufficient corrosion protection. However, it cannot be used in environments that cause dissolution corrosion of chrome plating. ◆Hardness Slightly lower than normal hard chrome plating, approximately Hv600-700. ◆Heat Resistance 400℃ ◆Glossiness and Processing Characteristics Like regular chrome plating, it can be peeled and reprocessed. The glossiness can be adjusted, and specifications of 60°HGs (haze) of 0.6 or higher can be set. ◆For more details, please contact us.
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Applications/Examples of results
Crostons are used in applications where conventional hard chrome plating does not provide sufficient corrosion resistance. ◆◇◆ Specific Examples of Use ◆◇◆ ◆ As a rust-preventive undercoating for hard chrome plating ◆ Various engraving rolls and embossing rolls where changes in gloss are important ◆ Molds and parts for glass and plastic forming that require heat and corrosion resistance ◆ Stainless steel parts that need to prevent crevice corrosion, pitting, and intergranular corrosion when used in seawater or coastal environments, such as seals, valve shafts, and pump shafts ◆ Parts that cause high-temperature corrosion such as sulfide corrosion and vanadium corrosion ◆ Parts intended to prevent gas corrosion ◆ Parts that require oxidation resistance ◆ Parts intended to prevent corrosion in high humidity environments
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Company information
We are a technology-oriented company that focuses on plating technology and roll manufacturing technology as our two main pillars. We possess extensive know-how in various functional plating and high-precision roll manufacturing and processing, and we strive to be of service to our customers day and night. We actively take on challenges that other companies have declined or that no other company is willing to tackle.