Pangobatan lumahing umum kanggo Bolts

Lapisan: aplikasi lapisan kanggo lumahing bolt kanggo nggawe film seragam sing mbenakake resistance karat lan katon. Kauntungane yaiku katon apik, nanging kekurangane yaiku ora awet lan gampang gores.
Hot-dip galvanizing: nyemplungaken bolt ing seng molten kanggo nambah resistance karat sawijining. Kauntungane yaiku nduweni kemampuan anti-karat sing kuwat lan ora gampang ambruk, nanging kerugian iku lumahing ora cukup ayu.
Electroplating: nyemplungake bolt ing elektrolit lan nyelehake lapisan logam ing permukaan bolt liwat elektrolisis kanggo nambah resistensi karat lan katon.. Kauntungane yaiku permukaane alus lan apik, nanging kerugian punika rentan kanggo embrittlement hidrogen.
Dacro: immersing the bolts into a zinc-aluminum solution, ensuring that the bolt is fully in contact with the solution before shaking off the excess solution and drying it. Repeat the above process 2-4 times to form a dense film on the surface of the bolt, achieving the effect of anticorrosion. The advantage of this process is that the surface is beautiful and not easy to fall off, nanging kekurangane yaiku ora awet lan gampang gores. Now there is a hexavalent chromium-free formula, which is more environmentally friendly.