CORROSION DAMAGES OF BORING PIPES  FROM ALUMINIUM ALLOYS D16  AND 1953 when OPERATIng IN THE CONDITIONS OF OIL WELLS

The paper considers the nature of corrosion in boring pipes from aluminum alloys D16 and 1953 used in the conditions imitating the development of oil wells. Tests for corrosion cracking and contact corrosion have been fulfilled. It has been obtained that in these conditions both alloys are not subject to corrosion cracking. However, the contact corrosion significantly influences alloy 1953. The authors have studied the possibility to protect the surface of aluminum pipes by oxygenating thecontact zone with a steel lock. The paper shows the efficiency of this protection of boring pipes and describes the metallographic research on the alloy structure after a corrosive attack of the environment.