Process for making an oxide-layer

Details Process for making an oxide-layer Process for making an oxide-layer

1975-08-11

1977-07-12

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 16, 148 63, 427248E, C23C 1108

Patent

active

040352005

ABSTRACT:
A blackening process of producing an oxide layer consisting predominantly of Fe.sub.3 O.sub.4 on an iron surface in an oxidizing atmosphere and at a temperature of from 500.degree. to 650.degree. C, whereby the oxidizing atmosphere is produced by understoichiometrically burnt fuel gas without removal of water from the combustion gases. In the combustion chamber, the apparent reaction temperature is controlled by cooling to provide an apparent reaction temperature of from 500.degree. to 800.degree. C. The combustion products are conducted into a heated blackening chamber at a temperature substantially above the dew point of the combustion products. The CO characteristic of the combustion gases is monitored and is used to control the air and fuel supplies.

REFERENCES:
patent: 2269943 (1942-01-01), Kiser
patent: 2398012 (1946-04-01), Kiser
patent: 2543710 (1951-02-01), Schmidt et al.
patent: 3368386 (1964-04-01), Harvey
patent: 3398481 (1968-08-01), Lake
patent: 3708351 (1973-01-01), Dallas et al.
patent: 3932246 (1976-01-01), Stodler et al.

Affiliated with

Also associated with

Rating

Process for making an oxide-layer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for making an oxide-layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making an oxide-layer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-486040