MASKED METAL DIFFUSION
Assignee
ALLOY SURFACES COMPANY, INC.,. A CORP. OF DE.
Filed
Feb 28, 1984
Granted
Jul 4, 1989
Location
WYNNEWOOD PA US
Abstract
Very good masking of pack diffusion aluminizing on any metal to keep portions from being diffusion coated, is effected by localized coating layers the lowest of which is inert or depletion-reducing masking powder that can have same composition as substrates, mixed with non-contaminating film-former such as acrylic resin. The upper coating layer or layers can be of non-contaminating particles like nickel or Cr2 O3 that upon aluminizing or chromizing become coherently held together to form a secure sheath. Such sheath can also be used for holding localized diffusion-coating layer in place. Film-former can be dissolved in volatile solvent, preferably methyl chloroform, in which masking powder or sheath-forming powder is suspended. Chromizing can be performed before aluminizing for greater effects.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Aug 1, 1985
Rescinded
Aug 30, 1988
Duration
3 years, 1 month
Inventor
- 1ALFONSO L. BALDI
Record Details
- Patent number
- US 4845139
- Application
- 06584538
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records