EXHIBIT 23.2





            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


We hereby consent to the incorporation by reference in the:

(i)  Registration Statement No. 33-29287 on Form S-8 and related Prospectus with
     respect to the 1989 Long Term Performance  Incentive Plan of NL Industries,
     Inc.; and

(ii) Registration Statement No. 33-25913 on Form S-8 and related Prospectus with
     respect to the NL Industries, Inc. Retirement Savings Plan; and

(iii)Registration  Statement  No.  333-65817 on Form S-8 and related  Prospectus
     with respect to the NL Industries, Inc. 1998 Long-Term Incentive Plan; and

(iv) Registration Statement No. 33-48145 on Form S-8 and related Prospectus with
     respect to the NL Industries, Inc. 1992 Non-Employee Directors Stock Option
     Plan.

of our  reports  dated March 30, 2005  relating  to the  consolidated  financial
statements,  management's  assessment of the  effectiveness  of internal control
over  financial  reporting  and  the  effectiveness  of  internal  control  over
financial  reporting  of  Kronos  Worldwide,  Inc.,  which are  incorporated  by
reference in this Form 10-K.



                                                     PricewaterhouseCoopers LLP



Dallas, Texas
March 30, 2005