Ihe pp nke gbara ọkpụrụkpụ, mgbochi corrosion na inogide, dabara maka ọtụtụ ụlọ mposi na ahịa, imewe nnukwu dayameta adịghị egbochi, imewe ezi uche na ntinye dị mma, imebe mgbidi 3mm gbara ọkpụrụkpụ, nrụgide ike ndọda, na-eguzogide corrosion na inogide.