When steel and aluminium are riveted together, an insulating material is required at the joint, as corrosion occurs between any two dissimilar metals which are in contact, because of what is known as electrolytic action.
Xa istili ne aluminium zibethelelwe zadibana, imateriyali egqumayo iyofuneko kwiijcyinti ngenxo yokuba ukudleka kuyemeka phakalthi kweziniyithi ezingafaniyo ezidibeneyo, nejenxa yalente kuthiwe sisenzo solwahlulo.