It is a reliable surface pretreatment technology that efficiently removes welding burn and oxide scale, bringing out the inherent beauty and corrosion resistance of the metal.
The acid pickling treatment by Toyo Chemical removes scale, welding discoloration, oil, and impurities adhered to the surfaces of metals such as stainless steel through chemical reactions, bringing out the material's inherent luster, cleanliness, and corrosion resistance. It is widely used as a pre-process for electropolishing and passivation treatment, playing a crucial role in creating an important "foundation" that influences the quality of subsequent processes. The treatment is performed by immersing the materials in a specialized chemical solution, which means that no physical pressure is applied, allowing for a uniform finish even on complex shapes and the inner surfaces of pipes. There is almost no dimensional change or damage to the surface, enabling stable treatment regardless of product shape or material. The main target materials are stainless steels such as SUS304 and SUS316, and the shapes we accommodate include pipes, fittings, frames, and sheet metal structures, among others. Acid pickling treatment is effective not only for improving appearance but also for enhancing corrosion resistance, cleanliness, and coating adhesion. We have many successful applications in fields that require high cleanliness and durability, such as medical devices, food manufacturing equipment, and semiconductor-related components. From prototypes to mass production, we propose optimal treatment conditions tailored to your needs.
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basic information
Corresponding materials: SUS304, SUS316, SUS316L, SUS430, other stainless steels Corresponding shapes: piping components, frames, chambers, tanks, complex shapes, inner surface treatment parts, etc. Processing method: immersion-type pickling treatment (chemical reaction using dedicated chemicals) Purpose of treatment: removal of oxide scale, removal of welding burn, degreasing, improvement of cleanliness, surface preparation Dimensional change: minimal (only changes in the order of μm due to non-contact processing) Appearance after treatment: slightly matte to the metallic luster of the base material (varies depending on material and pre-treatment) Examples of combined use with other processes: before electropolishing, before passivation treatment, before cleaning process, after buff polishing, etc. Quality control items: appearance inspection, processing history records, lot management, optional photo record support available Corresponding lot: can accommodate from small prototype of 1 piece to mass production, regardless of size Optional support: vacuum packaging, inspection certificate attachment, identification labels, consistent support for pre- and post-treatment, etc. Remarks/Special notes: Special materials and dimension tolerance products require prior consultation, prototype support available, environmentally compliant chemicals used.
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Applications/Examples of results
【Target Industries】 Medical devices / Food manufacturing equipment / Semiconductor manufacturing equipment / Chemical plants / Precision machinery / Research equipment, etc. 【Target Parts and Product Names】 Piping, chambers, welded structures, frames, nozzles, tanks, sheet metal parts, etc. 【Processing Objectives】 Removal of welding burn marks / Scale removal / Degreasing and cleaning / Electrolytic polishing pretreatment / Passivation pretreatment, etc. 【Shape and Material Characteristics】 SUS316 piping inner surface treatment / Complex-shaped small-diameter parts / Areas not suitable for buffing / Parts prone to burning 【Adoption Results / Application Examples】 Piping parts for food filling machine manufacturers / Surface treatment for medical device parts / Tanks for semiconductor equipment 【Lot Size and Processing Frequency】 Can accommodate from small prototype quantities (1 piece) to mass production, regardless of size 【Remarks and Requests】 Request for inspection certificate / Vacuum packaging support / Desire for integrated processing with subsequent processes / Request for confirmation with drawings
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Company information
Toyohashi Chemical Co., Ltd. is a comprehensive technology company that consistently responds to a wide range of needs, from contract processing to the manufacturing of surface treatment agents and processing equipment, the development of automatic inspection devices, and even technical consulting, as a leading company in metal surface treatment. We have established a consistent production system utilizing precise electro-polishing and cleaning technologies, vacuum packaging and assembly in clean rooms, and advanced processing techniques. We have gained high trust in fields where quality is essential, such as semiconductors, medical devices, and food-related equipment. As a partner that responds to all surface treatment challenges with technology and flexible adaptability, we continue to support our customers' manufacturing endeavors.