Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Ultrasonic Cleaning of High Purity Aluminum and Aluminum Alloys with Nitric Acid

IP.com Disclosure Number: IPCOM000082538D
Original Publication Date: 1974-Dec-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Missel, L: AUTHOR [+2]

Abstract

Ultrasonic cleaning in HNO(3) effectively removes debris as well as Bi, Cl, etc., from pits in the Al surface. The attack on the Al is minimized as the % of HNO(3) is increased. For instance, 90% concentration is good, red fuming HNO(3) is better.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Ultrasonic Cleaning of High Purity Aluminum and Aluminum Alloys with Nitric Acid

Ultrasonic cleaning in HNO(3) effectively removes debris as well as Bi, Cl, etc., from pits in the Al surface. The attack on the Al is minimized as the % of HNO(3) is increased. For instance, 90% concentration is good, red fuming HNO(3) is better.

The cleaning procedure involves a vapor degrease followed by an air dry. The next step is soaking in HNO(3), as specified, i.e., 60-120 seconds, followed by ultrasonic cleaning without removal from the HNO(3) for a short duration, e.g., 10 seconds. A deionized water rinse and a reagent grade isopropanal rinse is then performed followed by forced air drying.

The ultrasonic cleaning in the HNO(3) removes asperity and pit causing debris and cleans the Al surface.

1