C - Chemistry – Metallurgy – 23 – G
Patent
C - Chemistry, Metallurgy
23
G
C23G 1/24 (2006.01) C23G 1/02 (2006.01) C23G 1/08 (2006.01) C23G 1/10 (2006.01)
Patent
CA 2260172
Fluoride-containing scale can be removed from metal surfaces such as titanium, titanium alloys, nickel alloys, and stainless steel by contacting the metal surfaces with an aqueous salt solution of an inorganic acid, including its hydrates. The cationic portion of the salt can be aluminum, iron and mixtures thereof. The anionic portion of the salt can be a chloride, a nitrate, a sulfate, and mixtures thereof. The contracting occurs in the absence of the addition of an acid, such as hydrochloric, nitric, or sulfuric acid. The presence of the aqueous salt solution with the dissolved fluoride scale does not accelerate or increase the normal rate of metal corrosion that can occur in the absence of the aqueous salt solution or any acidic cleaning agent.
On peut enlever le tartre contenant du fluorure depuis des surfaces en métal, tel que du titane, des alliages de titane, des alliages de nickel et de l'acier inoxydable, en mettant ces surfaces en contact avec une solution aqueuse de sel d'un acide inorganique, y compris ses hydrates. La partie cationique du sel peut être aluminium, fer et leurs mélanges. La partie anionique du sel peut être un chlorure, un nitrate, un sulfate et leurs mélanges. La mise en contact s'effectue en l'absence d'un apport d'acide, tel que de l'acide hydrochlorique, nitrique ou sulfurique. La présence de la solution aqueuse de sel avec le tartre de fluorure dissous n'accélère ni n'augmente la vitesse normale de corrosion du métal pouvant apparaître en l'absence de cette solution ou de tout agent de nettoyage acide.
von Klock Byron
Webster George Henry Jr.
Smart & Biggar
Texaco Development Corporation
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