METHOD OF INCREASING CORROSION RESISTANCE OF STRUCTURAL MATERIALS, METAL ARTICLE WITH INCREASED CORROSION RESISTANCE Russian patent published in 2016 - IPC C21D1/70 C23C22/00 

Abstract RU 2595184 C2

FIELD: metalworking.

SUBSTANCE: invention relates to thermochemical treatment of metal surfaces. To increase corrosion resistance of metal article surface is machined to allow surface-hardening and passivation of article surface, wherein mechanical treatment of article surface is carried out until surface roughness with mean arithmetic deviation of Ra profile no more than 1.6 mcm, hardening degree not below 5 %, hardening depth not less than 8 mcm, and passivation of article surface is carried out until layer of oxide film with thickness of not less than Ra + 1 mcm is obtained.

EFFECT: increased corrosion resistance of articles.

7 cl

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RU 2 595 184 C2

Authors

Sharikpulov Said Mirfaisovich

Dates

2016-08-20Published

2014-08-06Filed