6-series aluminum alloy grain boundary corrosive agent and grain size display method

• Main Authors: LIU YUANSEN, MENG XIANGLIANG, JIAO ZENGTIAN, LIN YONGQIANG, LI HEBIN
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2021
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PHYSICS; TESTING

The invention belongs to the technical field of metal detection, and discloses a 6-series aluminum alloy grain boundary corrosive agent and grain size display method. The grain boundary corrosive agent is a suspension prepared by mixing an alkali metal hydroxide aqueous solution and a copper sulfate aqueous solution. According to the corrosive agent and the method, the suspension obtained by mixing the alkali metal hydroxide aqueous solution and the copper sulfate aqueous solution is used for corroding a 6-series aluminum alloy, and an effect that a grain boundary is corroded prior to grains can be achieved, so that the grain boundary can be completely displayed, the requirement for grain size detection is met, and the grain size evaluation accuracy of the 6-series aluminum alloy is improved. 本发明属于金属检测技术领域，公开了一种6系铝合金的晶界腐蚀剂及晶粒度显示方法，所述晶界腐蚀剂为碱金属氢氧化物水溶液和硫酸铜水溶液混合制成的悬浮液。本发明采用碱金属氢氧化物水溶液和硫酸铜水溶液混合所得的悬浮液对6系铝合金进行腐蚀，可以达到晶界优先于晶粒发生腐蚀的效果，从而能够完整地显示晶界，满足晶粒度检测的要求，提高6系铝合金的晶粒度评定准确度。