Nord. To this day, stainless steel has often seemed unrivalled when there are strict hygiene requirements and aggressive cleaning agents are mandatory. Now, thanks to a novel surface treatment method, light metal aluminium offers the required durability and is more cost-effective. This method also eliminates the disadvantages of customary coatings and paint finishes as well as stainless steel in gear manufacturing. A comparison of materials shows which solution is advantageous to applications in the food and beverage industry as well as many other sectors. Machine and systems engineering for the food industry must meet the high standards of producers. The requirements for materials utilised in production are as diverse as the range of processed foodstuffs and beverages.