If you mean chemical burns instead of diaper rash then you should try seventh generation diapers or honest diapers which have no harsh chemicals that could cause chemical burns like the Pampers and huggies brand diapers do.
If you change any diaper promptly and not let your baby stay in the same wet or dirty diaper for too long and wipe good after every diaper change then your baby should not get diaper rash.
You should put diaper rash cream on your baby when you change their diaper and most often put diaper rash cream on your baby overnight or when you might not be able to change the diaper in a good amount of time such as on a plane ride or a road trip.