Yog vim li cas rau lub xub ntiag ntawm ib tug pom pom ntawm corrosion pits nyob rau saum npoo ntawm welded steel kav tom qab pickling

Tom qab pickling, welded steel kav yog nquag tsim corrosion pits raws longitudinal weld seam, ua rau muaj tshwm sim ntawm xws li tsis xws luag tshwj xeeb tshaj yog nyob rau hauv gas-welded thiab furnace-welded steel kav. Qhov laj thawj tseem ceeb ntawm cov weld seam corrosion pit clusters yog qhov sib txawv ntawm qhov sib txawv ntawm qhov vuam seam thiab cov hlau puag thaum lub sij hawm vuam, uas ua rau muaj kev ntxhov siab sab hauv. Cov cheeb tsam uas muaj kev ntxhov siab sab hauv yog qhov cuam tshuam rau ntau qib ntawm corrosion los ntawm cov tshuaj pickling. Tsis tas li ntawd, oxides thiab lwm yam impurities nias rau hauv qhov sib txuas ntawm cov khoom sib txuas thaum lub sij hawm welding muaj qhov sib txawv ntawm corrosion nyob rau hauv cov tshuaj pickling vim lawv txawv hluav taws xob muaj peev xwm, ua rau tsis sib xws corrosion pits.