6585844518

IV

III

A) Norlh of Rivnę region I - miki corrosion (25%): II - tendency to corrosion (20%); III - very high dcgrce of corrosion (30%); IV - an extremely high degree of corrosion (25%)

B) Volyn region

I - mild corrosion (43.75%): II -tendency to corrosion (43.75%); III -very high dcgrce of corrosion (12.5%);