Method of applying coating on articles from plain steel

专利摘要:
A non-alloy steel is treated to provide a good keying surface for a solid polymeric or wax coating by heat treatment at 550 to 720 deg C for up to 4 hours in an atmosphere of, eg ammonia and endothermic or exothermic gas, followed by cooling to produce an epsilon iron nitride surface layer. The solid coating adheres tenaciously to the surface layer to give excellent salt spray resistance.
公开号:SU1364242A3
申请号:SU823489306
申请日:1982-09-03
公开日:1987-12-30
发明作者:Дос Кирил；Дэвид Смит Джон
申请人:Лукас Индастриз Паблик Лимитед Компани (Фирма)；
IPC主号:

专利说明:

one
This invention relates to methods for coating a metal substrate to a coating.
The aim of the invention is to increase the corrosion resistance of products.
The method is carried out as follows.
Example. The processed products are subjected to carbonitriding at 550–660 ° C for an hour in an atmosphere of ammonia and an endothermic gas mixture. A layer of epsilon-iron nitride with a thickness of 15-25 microns is formed. Thereafter, cooling is carried out in a non-oxidizing environment and a solid organic coating is applied to the nitro-cemented product. The cooling is carried out by quenching in oil or by slow cooling in a nitrocentizing atmosphere. After quenching in oil, the product is degreased and heated to remove moisture.
Corrosion resistance of the products processed by the proposed and known methods is presented in the table.
ten
13642422

权利要求:
Claims (3)
[1]
1. The method of coating non-alloy steel products, including heating and hardening in a nitro-cementing gaseous medium to form epsilon-iron nitride, cooling and applying a solid organic protective coating, is characterized in that, in order to increase the corrosion resistance of products, cooling carried out in a non-oxidizing environment.
[2]
2. Method pop. 1, differing from 15 u and in order to form
Epsilon-nitride layer of iron with a thickness of 15–25 µm is heated in a nitro-cementing medium at 550–720 ° C for a duration of 0.5–4 h at this temperature in an atmosphere of ammonia and endothermic gas, ammonia and exothermic gas or ammonia and nitrogen with the addition, if necessary, of at least one of the following components: carbon dioxide, carbon monoxide, air, or methane.
[3]
3. Method POP.1, excluding that cooling is carried out by quenching the product in
30 oil and prior to coating apply degreasing and then heating to remove moisture.
oxidative-oxidative oxidative dehydration in lithium air, atmospheric atmosphere, atmospheric atmosphere, nitrocene atmosphere, atmospheric atmosphere, and other
Compiled by S. Derkachev Editor A. Lezhnin Tehred L. Serdyukov Proofreader V. But ha
Order 6386/58 Circulation 937 Subscription
VNIIPI USSR State Committee
for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
Production and printing company, Uzhgorod, st. Project, 4

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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GB8126928|1981-09-05|

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