未热处理的7075铝合金的变形组织和晶界用什么腐蚀啊

Etchants for Aluminum and Alloys

(1)
0.1-10 mL HF
90-100 mL distilled water

General purpose reagent. Attacks FeAl3,other constituents outlined. Grain contrast usually poor.The 0.5% concentration of HF is very popular. Use by swabbing.

(2)Keller’s Reagent
2.5 mL HNO3
1.5 mL HCI
1 mL HF
95 mL distilled water

Very popular general purpose reagant for Al and Al alloys, except high Si alloys. Swab sample 10-20 seconds. Wash in warm water. Can follow with a dip in concentrated HNO3. Outlines all common constituents, reveals grain boundaries in certain alloys.


注意操作方法!!!

1楼推荐的两种试剂都很好用,只是在腐蚀时要用浸蚀法,时间稍长,一般在10分种以上.