2. Gbasa ụhara nke Q345B seamless square tube, Q345B square tube-Q345B square tube-Q345B square steel tube-Q345B cold drawn square tubeIgwepụta nchịkọta na nkwụsị nke Q345B a na-eji ejizi iji wepụ mmasị na pịpụ ala.Q345B ohuru si n'etiti ụgbọelu mgbọrọde jiri akwụkwọ nke Chimi na nke elektrolisis.Ndlela ya, Q345B ohuru dìàlụ̀ átrībúùtù átrībúùtù dị mfe ka ha na-ewepụ ọdịmma leghara n'elu nke mpaghara mgbasaịtị Q345B na ntụrụndụ ahụ agaghị ewepụ ọdịgide nakwa okside enweghị ike.Ya mere, a ga-eji ụdị ụzọ esi ụdị a sọsọ dịka onye na-enyemaka na imepụta ihe gbasara mgbasa ozi na imepụta ihe.Way.
3. Ihe mgbakwunye site na Q345B without seamless square tubes.When pickling passivation for Q345B seamless square tubes, one will use organic chemistry and electrolysis. Ụgbọelu mgbọgbọelu nke Q345B na-enweghị nchegbọelu nwepụ skee okside.A na-ekewapụtara ya n'ụzọ abụọ.reason for the development is that chemical water treatment can only clean the surface completely.Maka ụfọdụ oke ọgwụ, ọ dị oke ịgwụ n'ihi ọdịmma nke ndị mmadụ mara ya.