NEAR NEUTRAL PH PICKLE ON MULTI-METALS

• Main Author: AOUN CHALO
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2020
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DETERGENT COMPOSITIONS; DETERGENTS; DIFFUSION TREATMENT OF METALLIC MATERIAL; FATTY ACIDS THEREFROM; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; USE OF SINGLE SUBSTANCES AS DETERGENTS

A near neutral pH pickling composition for the removal of oxides from metallic surfaces, including heat treated steel. The pickling composition comprises a) a water-soluble organic or inorganic nitrocompound, wherein a central N atom has an oxidation state of 3+; b) a polarizing agent for the nitro compound, wherein the polarizing agent comprises at least one of a phosphonate and a carboxylate; c) a pH buffer, and d) at least one metal complexing agent. The composition is preferably maintained at a pH between about 4.5 and about 7.5. The near neutral pH pickle composition can be used on various metallic surfaces as well as composite surfaces comprising metallic and non-metallic portions. 本发明提出了一种用于从金属表面，包括经热处理的钢去除氧化物的近中性pH酸洗组合物。所述酸洗组合物包含a)水溶性有机或无机硝基化合物，其中中心N原子具有3+的氧化态；b)用于所述硝基化合物的极化剂，其中所述极化剂包括膦酸盐和羧酸盐中的至少一者；c)pH缓冲剂；以及d)至少一种金属络合剂。所述组合物优选地保持在介于约4.5和约7.5之间的pH下。所述近中性pH酸洗组合物可用于各种金属表面以及包括金属部分和非金属部分的复合表面上。