The corrosion resistance of iron and steel can be improved by treatment with sulfuric and phosphoric acids. Other metals are also affected through the introduction of chemicals.

The spring edition of Futureminds has articles from a range of contributors, with advice about writing assessments, the history of the 555 timer chip, how to use exercise books in D&T, Scalextric4Schools, The Design Ventura challenge, news from the Food Teachers Centre and a guide to LEV testing, plus the usual smallprint, and look out for something a bit different on the last page...

It is often necessary to have access to the underside of vehicles or all-round assemblies such as engines, gear-boxes, etc. All of these are heavy so hoists, jacks, cranes and lifts are needed.

General use of domestic-type pressure cookers.