| Popis: |
The chapter discusses various methods used to treat steel for adhesive bonding focusing mainly on carbon steels, low alloy steels and stainless steels. It states that the key factors to be considered when bonding to steel are cleanliness and descaling or rust, oxide removal, and passivation (in case of stainless steel). Corrosion resistance of stainless steel is accomplished by passivation which is defined as making a surface inactive, or less reactive. It also outlines the disadvantages of chemical etchants over mechanical surface preparations. There are numerous reported surface preparations for carbon, low alloy and stainless steels including phosphoric acid-alcohol process, nitric-phosphoric acid process, sulfuric acid-sodium dichromate process and sulfuric acid-sodium bisulfate process. It provides an overview of steps involved in the preparation for bonding to oily steel. Information related to the corrosion resistant conversion coatings of steel is presented. Surface treatments for stainless steel and specialty stainless steel are described in detail including discussion on AM 355 stainless steel. |
