The corrosion behavior of several heat resistant materials in air plus 2 vol-% Cl-2 at 300 to 800 degrees C - Part I - Fe-base and Fe-containing alloys

In the present paper the corrosion behavior of 2 1 /4 CrlMo steel, Alloys 8 00H, AC66, 45TM and 690 was investigated at 300 to 800 degrees C in dry air and synthetic air with 2 vol.-% Cl-2. The data reveal that the major role determining corrosion resistance are played by Fe in the alloys. In particu lar if the same Cr-contents are present in the alloys it is only the Fe con tent which decides on resistance against Cl-attack while additions of even almost 3 % of Si evidently have only little effort.