金属の酸洗・スケール除去・不動態化

Acid cleaning and pickling chemistries remove mill scale, oxide, rust, weld heat tint, and inorganic soils from metal surfaces during fabrication and finishing. RawSource sources the mineral and organic acids, fluoride pickling agents, and corrosion inhibitors used across pickling, descaling, derusting, and acid passivation — in drums, totes, and container quantities, matched to your substrate, process, and specification.

適切な酸は対象金属と工程によって決まります。Hydrochloricと sulfuric acid are the workhorse pickling acids for carbon and low-alloy steel, dissolving mill scale and rust ahead of galvanizing, cold rolling, or coating. Stainless steel is pickled with nitric–hydrofluoric acid baths to strip oxide scale and weld heat tint, and passivated with nitric or citric acid (for example, per ASTM A967 / AMS 2700) to restore the passive chromium-oxide film. Phosphoric acid cleans and derusts steel and deposits an iron-phosphate conversion layer for pre-paint pretreatment. Oxalic, sulfamic, glycolic, and formic acids handle rust, scale, and clean-in-place (CIP) descaling of boilers and heat exchangers where a chloride-free or lower-fume chemistry is preferred.

フッ化物系薬剤と浴用添加剤がラインアップを補完します。 Ammonium bifluoride is a solid, easier-handling source of fluoride for pickling and descaling stainless steel, titanium, and aluminum, and serves as the fluoride component of nitric–hydrofluoric pickle baths. Because a strong acid attacks the base metal as well as the scale, pickling and acidizing baths are typically run with a corrosion inhibitor: プロパルギルアルコール は、高温の塩酸または硫酸中で鋼表面に皮膜を形成する代表的なアセチレン系腐食防止剤で、 thiourea とその誘導体は、長年使われてきた酸洗用腐食防止剤です — いずれも低添加率で用いられ、酸がスケールを除去し続ける間、母材の溶出と水素吸収を抑えます。

全グレードは工業用および専門業務用に限定して供給されます。酸洗浄薬剤は腐食性があり、適切な工学的対策、保護具、中和および廃棄物処理の手順が必要です。使用前には必ず最新の安全データシート (SDS) を確認し、材料適合性、希釈条件、および対象工程・法域における規制ステータスをご確認ください。